Developer & DevOps for Operations
150 developer & devops tools hand-picked for Operations.
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AI Eval Planner
Generate eval cases, pass criteria, and edge cases from an AI feature, risks, and user path.
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awk + sed Cheatsheet
awk + sed cheat sheet — 80+ one-liners for text processing, with real examples and common pitfalls.
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AWS CLI Cheatsheet
AWS CLI cheat sheet — 80+ commands for EC2 / S3 / IAM / Lambda / RDS / EKS / CloudFormation with real examples.
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Base64 Block Deduplicator
Find duplicates and keep one clean copy of base64 blocks from pasted text or uploaded local files.
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Base64 Block Extractor
Extract, dedupe, and export base64 blocks from pasted text or uploaded local files.
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Base64 Block List Converter
Convert base64 blocks from pasted text or uploaded local files.
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Base64 Block List Validator
Validate and explain issues in base64 blocks from pasted text or uploaded local files.
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Base64 Block Normalizer
Normalize, sort, and prepare base64 blocks from pasted text or uploaded local files.
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Base64 to File Converter
Paste raw Base64 or a data URL, decode it locally, inspect bytes, and download the reconstructed file.
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Bash Cheatsheet
Bash cheat sheet — 100+ commands & idioms for variables, conditionals, loops, functions, pipes, traps, with real one-liners.
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Batch File Rename Planner
Upload a batch, generate safe new filenames with sequence numbers and case rules, then export a CSV plan.
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Bcrypt Generator
bcrypt password hash generator + verifier — pick rounds, hash and compare in browser.
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Common Ports Reference
TCP/UDP port cheat sheet, 60+ services, search by number or name, copy in one click, browser-only
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Credit Card Number Deduplicator
Find duplicates and keep one clean copy of credit card numbers from pasted text or uploaded local files.
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Credit Card Number Extractor
Extract, dedupe, and export credit card numbers from pasted text or uploaded local files.
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Credit Card Number List Converter
Convert credit card numbers from pasted text or uploaded local files.
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Credit Card Number List Validator
Validate and explain issues in credit card numbers from pasted text or uploaded local files.
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Credit Card Number Normalizer
Normalize, sort, and prepare credit card numbers from pasted text or uploaded local files.
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Cron Expression Explainer — Decode Any Cron + Next 20 Runs
Cron expression explainer — paste any cron, get plain English/Chinese + next 20 runs + visual time grid.
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Crontab Helper — Visual Builder & Explainer
Visual crontab builder + human-readable explanation + next run preview.
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CSP Policy Auditor
Inspect Content-Security-Policy directives for unsafe sources, missing fallbacks, framing gaps, object-src, base-uri, and reporting coverage.
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CSS Minifier
Minify CSS — strip comments, whitespace, shorten colors, merge selectors. 30-60% smaller.
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CSV Column Extractor
Upload or paste CSV, keep only selected columns by name or index, and export a smaller privacy-safe file.
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CSV Data Quality Profiler
Upload CSV or TSV and profile missing values, inferred types, invalid cells, duplicate rows, whitespace issues, top values, and numeric outliers.
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CSV Deduplicator
Remove duplicate CSV rows by full row or selected key columns from uploaded files, locally and safely.
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CSV Filter
Filter uploaded CSV rows by column value using contains, equals, or regex, with local browser processing.
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CSV Header Normalizer
Standardize CSV header rows to snake_case, kebab-case, camelCase, or Title Case before imports and scripts.
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CSV Sorter
Sort uploaded CSV rows by a selected column with numeric-aware ordering and local-only processing.
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CSV Stats Summary
Upload CSV and get a quick Markdown profile of filled, missing, unique, numeric, min, max, and average values.
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CSV ⇄ JSON Converter
Convert CSV to JSON or JSON to CSV — handles quoted commas, newlines in cells, custom delimiter — browser-only
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CSV to Markdown Table
Convert uploaded or pasted CSV into clean Markdown tables with quoted-cell support, locally in the browser.
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CSV to TSV Converter
Convert CSV files to tab-separated values while preserving quoted commas, quotes, and multiline cells locally.
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CSV to YAML Converter
Turn a spreadsheet export into a clean YAML array of objects — RFC 4180 quoting, optional type inference, browser-only
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CSV Transposer
Flip CSV rows and columns from uploaded files or pasted data, with ragged-row handling and local output.
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curl Cheatsheet
curl cheat sheet — 80+ curl commands for GET/POST/auth/upload/download/SSL/proxy, with real examples and pitfalls.
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DNS Record Explainer
DNS record explainer — all 18 common record types (A, AAAA, CNAME, MX, TXT, SRV, etc.) with syntax, examples, and gotchas.
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Docker Cheatsheet
Docker command cheat sheet — 80+ commands with real examples, common mistakes, and Compose section.
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Domain Name Deduplicator
Find duplicates and keep one clean copy of domain names from pasted text or uploaded local files.
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Domain Name Extractor
Extract, dedupe, and export domain names from pasted text or uploaded local files.
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Domain Name List Converter
Convert domain names from pasted text or uploaded local files.
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Domain Name List Validator
Validate and explain issues in domain names from pasted text or uploaded local files.
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Domain Name Normalizer
Normalize, sort, and prepare domain names from pasted text or uploaded local files.
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Duplicate File Finder
Upload a batch and find exact duplicate files by SHA hash locally, with a Markdown cleanup report.
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Elasticsearch Cheatsheet
Elasticsearch cheat sheet — 80+ Query DSL, mapping, analyzer, aggregation, replication, with real examples.
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Email Address Deduplicator
Find duplicates and keep one clean copy of email addresses from pasted text or uploaded local files.
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Email Address Extractor
Extract, dedupe, and export email addresses from pasted text or uploaded local files.
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Email Address List Converter
Convert email addresses from pasted text or uploaded local files.
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Email Address List Validator
Validate and explain issues in email addresses from pasted text or uploaded local files.
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Email Address Normalizer
Normalize, sort, and prepare email addresses from pasted text or uploaded local files.
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Email Validator
Validate emails — RFC 5321 syntax + bulk paste + disposable detection + MX hint.
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ENV Secret Scanner
Scan .env files, config snippets, and CI logs locally for likely API keys, tokens, private keys, JWTs, and database URLs.
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Environment Variable Deduplicator
Find duplicates and keep one clean copy of environment variables from pasted text or uploaded local files.
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Environment Variable Extractor
Extract, dedupe, and export environment variables from pasted text or uploaded local files.
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Environment Variable List Converter
Convert environment variables from pasted text or uploaded local files.
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Environment Variable List Validator
Validate and explain issues in environment variables from pasted text or uploaded local files.
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Environment Variable Normalizer
Normalize, sort, and prepare environment variables from pasted text or uploaded local files.
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File Checksum Compare
Paste an expected checksum, upload a file, and verify SHA digest matches locally before installing or sharing.
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File Hash Calculator
Compute SHA-1, SHA-256, SHA-384, or SHA-512 hashes for uploaded files entirely in the browser.
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File MIME Type Inspector
Upload files and inspect filename, size, browser MIME type, extension, and magic-byte signature locally.
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File to Base64 Converter
Upload a small file and convert it to raw Base64 or a data URL locally for embeds, fixtures, and tests.
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Filename Sanitizer
Strip illegal characters and make any string a safe cross-platform filename, in your browser
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Font File Inspector
Upload TTF or OTF files and extract family names, PostScript names, version, units per em, glyph count, and table list.
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Git Cheatsheet
Git command cheat sheet — searchable, with explanations, common mistakes, and real examples.
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HAR Performance Analyzer
Upload a Chrome DevTools HAR file and get a local performance, cache, host, asset, status, and security-header report.
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.htaccess Generator
Generate Apache .htaccess — HTTPS redirect, www toggle, gzip, cache headers, hotlink protection.
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HTML Link Extractor
Upload HTML and extract anchors, images, scripts, stylesheets, canonicals, and meta URLs into CSV locally.
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HTML Minifier
Minify HTML — strip comments, whitespace, optional attributes, inline CSS/JS. 40-60% smaller.
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HTTP Header Deduplicator
Find duplicates and keep one clean copy of http headers from pasted text or uploaded local files.
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HTTP Header Extractor
Extract, dedupe, and export http headers from pasted text or uploaded local files.
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HTTP Header List Converter
Convert http headers from pasted text or uploaded local files.
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HTTP Header List Validator
Validate and explain issues in http headers from pasted text or uploaded local files.
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HTTP Header Normalizer
Normalize, sort, and prepare http headers from pasted text or uploaded local files.
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HTTP Security Header Auditor
Audit raw response headers for HSTS, CSP, cookie flags, MIME sniffing, clickjacking, referrer, and permissions policy gaps.
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HTTP Status Code Explorer
HTTP status code explorer — all 70+ codes with meaning, common causes, real examples, and what to check.
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Image Metadata Inspector
Inspect PNG, JPEG, GIF, WebP, and SVG dimensions, bit depth, ICC, EXIF, XMP, animation, and notes.
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INI Formatter & Validator
Format and validate INI / TOML-like config — sort sections, align equal signs.
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IPv4 Address Deduplicator
Find duplicates and keep one clean copy of ipv4 addresses from pasted text or uploaded local files.
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IPv4 Address Extractor
Extract, dedupe, and export ipv4 addresses from pasted text or uploaded local files.
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IPv4 Address List Converter
Convert ipv4 addresses from pasted text or uploaded local files.
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IPv4 Address List Validator
Validate and explain issues in ipv4 addresses from pasted text or uploaded local files.
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IPv4 Address Normalizer
Normalize, sort, and prepare ipv4 addresses from pasted text or uploaded local files.
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IPv6 Address Deduplicator
Find duplicates and keep one clean copy of ipv6 addresses from pasted text or uploaded local files.
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IPv6 Address Extractor
Extract, dedupe, and export ipv6 addresses from pasted text or uploaded local files.
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IPv6 Address List Converter
Convert ipv6 addresses from pasted text or uploaded local files.
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IPv6 Address List Validator
Validate and explain issues in ipv6 addresses from pasted text or uploaded local files.
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IPv6 Address Normalizer
Normalize, sort, and prepare ipv6 addresses from pasted text or uploaded local files.
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JS Minifier
Minify JavaScript — strip comments, whitespace, optional name shortening. 40-70% smaller.
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JS Obfuscator
Lightly obfuscate JavaScript in the browser: strip comments, remove debugger/console calls, and optionally wrap strings with base64.
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JSON Lines Formatter
Validate JSONL line by line, pretty-print it, convert to a JSON array, or export a CSV-like table locally.
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JSON Minifier
Minify JSON into a compact single line, optionally sort object keys, and keep everything local.
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JSON Schema Inferencer
Paste JSON or NDJSON samples and infer a Draft 2020-12 style schema with types, required fields, formats, enums, and examples.
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JWT Decoder
Decode JWT header / payload / signature — verify structure, check exp, copy claims — browser-only
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JWT Token Deduplicator
Find duplicates and keep one clean copy of jwt tokens from pasted text or uploaded local files.
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JWT Token Extractor
Extract, dedupe, and export jwt tokens from pasted text or uploaded local files.
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JWT Token List Converter
Convert jwt tokens from pasted text or uploaded local files.
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JWT Token List Validator
Validate and explain issues in jwt tokens from pasted text or uploaded local files.
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JWT Token Normalizer
Normalize, sort, and prepare jwt tokens from pasted text or uploaded local files.
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kubectl Cheatsheet
kubectl cheat sheet — 100+ Kubernetes commands with real examples, common pitfalls, and YAML snippets.
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Linux Permission (chmod) Calculator
Linux permission (chmod) calculator — convert between octal (755), symbolic (rwxr-xr-x), and ls -l forms, with safety warnings.
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List Comparison
Compare two lists line by line: only in A, only in B, in both, and merged — all in your browser
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LLM Pricing Calculator
Estimate daily and monthly LLM spend from tokens, request volume, and editable model prices.
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Local File Workbench
Triage a mixed batch locally for file type mismatches, duplicate candidates, metadata privacy, archive risks, and next-step tools.
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Log Error Analyzer
Paste logs and group repeated errors, warnings, stack traces, HTTP statuses, endpoint patterns, and time ranges into a local incident report.
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Log Line Cleaner
Clean noisy logs by removing timestamps, ANSI colors, blank lines, long lines, or non-error entries in your browser.
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MAC Address Deduplicator
Find duplicates and keep one clean copy of mac addresses from pasted text or uploaded local files.
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MAC Address Extractor
Extract, dedupe, and export mac addresses from pasted text or uploaded local files.
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MAC Address List Converter
Convert mac addresses from pasted text or uploaded local files.
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MAC Address List Validator
Validate and explain issues in mac addresses from pasted text or uploaded local files.
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MAC Address Normalizer
Normalize, sort, and prepare mac addresses from pasted text or uploaded local files.
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MD5 / SHA Hash Generator
Compute MD5 / SHA-1 / SHA-256 / SHA-384 / SHA-512 hashes — all five at once, browser-only
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MongoDB Cheatsheet
MongoDB cheat sheet — 80+ shell commands & query operators for CRUD, aggregation, indexing, replication.
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Nginx Cheatsheet
Nginx cheat sheet — common configs, location/server blocks, SSL, reverse proxy, gzip, real examples & gotchas.
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Number Extractor
Pull every number out of any text: integers, decimals, negatives, 1,234 commas, percents and 6.02e23, with instant sum and average
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Office Document Inspector
Inspect DOCX, XLSX, and PPTX package structure for macros, media, embedded objects, custom XML, and size hotspots.
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OpenAPI Endpoint Auditor
Audit OpenAPI JSON or YAML for endpoint coverage, missing operation IDs, security gaps, and weak response documentation.
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Package Lock Dependency Auditor
Inspect package-lock.json, pnpm-lock.yaml, or yarn.lock for duplicate versions, risky sources, prereleases, and missing integrity.
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Password Strength Checker
Check password strength — entropy, time-to-crack, breach pattern check (offline).
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PDF Metadata Extractor
Upload PDFs and extract document metadata, page-count hints, encryption flags, and producer details locally.
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PostgreSQL Cheatsheet
PostgreSQL cheat sheet — 80+ commands & functions for psql, JSONB, CTEs, window functions, indexing, partitioning, advanced extensions.
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Redis Cheatsheet
Redis cheat sheet — 80+ commands across strings, hashes, lists, sets, sorted sets, pub/sub, streams, scripts, with examples and pitfalls.
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Robots.txt Auditor
Check robots.txt for user-agent groups, allow and disallow rules, sitemap declarations, crawl-delay, and unsupported directives.
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Semantic Version Deduplicator
Find duplicates and keep one clean copy of semantic versions from pasted text or uploaded local files.
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Semantic Version Extractor
Extract, dedupe, and export semantic versions from pasted text or uploaded local files.
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Semantic Version List Converter
Convert semantic versions from pasted text or uploaded local files.
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Semantic Version List Validator
Validate and explain issues in semantic versions from pasted text or uploaded local files.
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Semantic Version Normalizer
Normalize, sort, and prepare semantic versions from pasted text or uploaded local files.
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SQL Formatter
Format and beautify SQL — supports MySQL, PostgreSQL, BigQuery, SQLite and 17 more dialects.
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SVG Asset Auditor
Audit SVG viewBox, dimensions, scripts, external references, styles, ids, classes, title, and desc tags.
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Text File Cleaner
Upload a text file and remove BOM, null bytes, trailing spaces, and excessive final blank lines locally.
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Text File Line Ending Converter
Upload or paste text and convert CRLF, CR, and LF endings to a consistent LF or CRLF output locally.
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Unix Timestamp Converter
Unix timestamp ⇄ human date — seconds / milliseconds / ISO 8601 — UTC and local — browser-only
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TSV to CSV Converter
Turn tab-separated files into standards-friendly CSV with proper quoting, download, and local processing.
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URL Deduplicator
Find duplicates and keep one clean copy of urls from pasted text or uploaded local files.
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URL Extractor
Extract, dedupe, and export urls from pasted text or uploaded local files.
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URL List Converter
Convert urls from pasted text or uploaded local files.
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URL List Validator
Validate and explain issues in urls from pasted text or uploaded local files.
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URL Normalizer
Normalize, sort, and prepare urls from pasted text or uploaded local files.
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URL Query Params Extractor
Extract, deduplicate, inspect, copy, and export query parameters from one URL or many URLs locally.
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UUID Deduplicator
Find duplicates and keep one clean copy of uuids from pasted text or uploaded local files.
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UUID Extractor
Extract, dedupe, and export uuids from pasted text or uploaded local files.
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UUID List Converter
Convert uuids from pasted text or uploaded local files.
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UUID List Validator
Validate and explain issues in uuids from pasted text or uploaded local files.
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UUID Normalizer
Normalize, sort, and prepare uuids from pasted text or uploaded local files.
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Vim Cheatsheet
Vim cheat sheet — 100+ commands covering modes, motions, edits, search, registers, splits, with mnemonics.
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XML Formatter & Validator
Pretty-print, minify, and validate XML in your browser — preserves CDATA, comments, and namespaces.
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XML ⇄ JSON Converter
XML to JSON converter — preserves attributes, nested elements, CDATA. Reversible.
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YAML Formatter & Validator
Format and beautify YAML — re-indent, validate, minify, sort keys.
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YAML to CSV Converter
Turn a YAML list of objects into an RFC 4180 CSV — column union, JSON or flattened nested values, comma / semicolon / tab, browser-only
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YAML ⇄ JSON Converter
Convert between YAML and JSON — both directions, pretty-printed, error messages with line numbers — browser-only
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ZIP Manifest Inspector
Read a ZIP central directory locally and flag traversal paths, encryption, duplicate names, and risky ratios.