Developer & DevOps for Marketer
65 developer & devops tools hand-picked for Marketer.
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App Store Keywords Checklist
Validate your App Store title, subtitle and 100-char keyword field before launch — live character counts, keyword overlap detection, asset checklist
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Barcode Generator
Code 128 / EAN-13 / UPC-A / Code 39 — generate scannable 1D barcodes, export SVG or PNG, fully offline.
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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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Chinese Idiom Search
800+ everyday chengyu — pinyin, origin, usage.
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Color Converter
HEX ⇄ RGB ⇄ HSL ⇄ HSV ⇄ CMYK — instant 5-way conversion, live swatch — browser-only
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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 Transposer
Flip CSV rows and columns from uploaded files or pasted data, with ragged-row handling and local output.
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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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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 Obfuscator
Hide your email from scraper bots — HTML entities, [at]/[dot] text, ROT13+JS link — browser-only, one-click copy
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Email Signature Generator
Fill in your details, pick a template, get table-based inline-style HTML that pastes cleanly into Gmail and Outlook — 100% browser-only
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Email Validator
Validate emails — RFC 5321 syntax + bulk paste + disposable detection + MX hint.
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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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Hreflang Tag Generator
Paste lang|url pairs, get hreflang link tags, HTTP Link header and sitemap XML with x-default and code validation, browser-only
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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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HTML to Markdown
HTML to Markdown — paste rich content, get clean .md with links, code, tables, lists preserved.
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Google Fonts CSS2 URL Builder
Parse, edit, and generate Google Fonts CSS2 links, HTML preconnect tags, @import CSS, variables, and Tailwind font stacks.
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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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JS Minifier
Minify JavaScript — strip comments, whitespace, optional name shortening. 40-70% smaller.
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JSON-LD Schema Generator
Build valid schema.org JSON-LD for Article, Product, FAQ, LocalBusiness, Event and more, copy the script tag, drop it in your head
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JSON to CSV Converter
Turn a JSON array (or object) into clean CSV — flattens nested keys, escapes per RFC 4180, custom delimiter, UTF-8 BOM for Excel — browser-only
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Mailto Link Generator
Build a mailto link with recipients, cc, bcc, subject and a multi-line body. Correct URL encoding, copy as plain URL or HTML anchor, all in your browser.
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Markdown Link Extractor
Upload Markdown and extract inline links, reference links, images, and bare URLs into a local CSV.
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Markdown Table Generator
Build Markdown tables visually — add/remove rows, column alignment, paste from Excel / CSV — browser-only
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Markdown to HTML
Convert Markdown to clean HTML — headings, lists, code, links, images, tables — instant live preview, browser-only
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Meta Tag Generator
Generate SEO meta tags — title, description, Open Graph, Twitter Card, Schema.org.
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Mock Data Generator
Generate realistic mock JSON / CSV / SQL data — names, emails, dates, addresses, nested objects.
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Open Graph & Social Card Preview
See your og:title, og:image and twitter:card exactly as Google, X, Facebook, LinkedIn, Slack and Discord will render them — before you ship.
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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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Batch QR Code Decoder
Drop a folder of QR images and get every decoded URL in one table — fast batch audit for packaging, posters, and print runs.
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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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robots.txt Generator
Generate robots.txt with templates for common crawlers (Google, Bing, AI scrapers).
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Sitemap URL Auditor
Paste sitemap XML and audit URL count, HTTP links, duplicates, trailing-slash conflicts, query parameters, lastmod freshness, and extensions.
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URL Slug Generator
Turn any title into a clean URL slug — lowercase, dashes, ASCII-safe transliteration, multiline batch — browser-only
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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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TSV to CSV Converter
Turn tab-separated files into standards-friendly CSV with proper quoting, download, and local processing.
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Twitter Card Generator
Build twitter:card meta tags for X with a live card preview, Open Graph fallback and one-click copy, all in your browser
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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 Encoder Decoder with Query Parameter Table
Encode, decode, inspect query parameters, process bulk URL lists, and copy clean outputs entirely in your browser.
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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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UTM Link Builder
UTM link builder — track campaign source, medium, name. GA4/Google Analytics compatible.