Format Converter for Developer

160 format converter tools hand-picked for Developer.

Angle Converter

Degrees, radians, gradians, turns, arcminutes, arcseconds and NATO mils, all from one input, copyable, browser-only
Base64 Encoder & Decoder

Encode or decode Base64 — text, files, and Data URLs. Runs entirely in your browser.
Base64 to File Converter

Paste raw Base64 or a data URL, decode it locally, inspect bytes, and download the reconstructed file.
BBCode to HTML Converter

Paste forum BBCode, get safe HTML — live preview, escaped output, one-click copy, all in your browser
Chinese Pinyin Converter

Chinese characters to pinyin — with tone marks or numbers, supports simplified and traditional.
Coordinate Converter

Convert GPS coordinates between DMS, decimal degrees and decimal minutes, paste straight into Google Maps, all in your browser
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.
Crontab Helper — Visual Builder & Explainer

Visual crontab builder + human-readable explanation + next run preview.
CSS Formatter & Minifier

Format and beautify CSS — sort properties, indent rules, expand or minify.
CSS Minifier

Minify CSS — strip comments, whitespace, shorten colors, merge selectors. 30-60% smaller.
CSS to Style Object

Paste CSS declarations, get a React inline style object — kebab keys camelCased, vendor prefixes handled, optional bare numbers, browser-only
CSV Column Extractor

Upload or paste CSV, keep only selected columns by name or index, and export a smaller privacy-safe file.
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.
CSV Deduplicator

Remove duplicate CSV rows by full row or selected key columns from uploaded files, locally and safely.
CSV Filter

Filter uploaded CSV rows by column value using contains, equals, or regex, with local browser processing.
CSV Header Normalizer

Standardize CSV header rows to snake_case, kebab-case, camelCase, or Title Case before imports and scripts.
CSV Sorter

Sort uploaded CSV rows by a selected column with numeric-aware ordering and local-only processing.
CSV Stats Summary

Upload CSV and get a quick Markdown profile of filled, missing, unique, numeric, min, max, and average values.
CSV to HTML Table

Paste CSV, get a clean HTML table, with header toggle, optional class and inline borders, all in your browser
CSV ⇄ JSON Converter

Convert CSV to JSON or JSON to CSV — handles quoted commas, newlines in cells, custom delimiter — browser-only
CSV to Markdown Table

Convert uploaded or pasted CSV into clean Markdown tables with quoted-cell support, locally in the browser.
CSV to SQL Converter

Turn CSV into CREATE TABLE + INSERT statements — type inference, safe value escaping, MySQL / PostgreSQL / SQLite — browser-only
CSV to TSV Converter

Convert CSV files to tab-separated values while preserving quoted commas, quotes, and multiline cells locally.
CSV to XML Converter

Turn a CSV table into clean, indented XML — name the root and row elements, columns as elements or attributes, escaped output. Browser-only.
CSV to YAML Converter

Turn a spreadsheet export into a clean YAML array of objects — RFC 4180 quoting, optional type inference, browser-only
CSV Transposer

Flip CSV rows and columns from uploaded files or pasted data, with ragged-row handling and local output.
Data Storage Converter

Convert bytes, KB, MB, GB, TB and bits — decimal (1000) and binary (1024, KiB/MiB/GiB) side by side, with the hard-drive 931 GiB gotcha explained — browser-only
Domain Name Deduplicator

Find duplicates and keep one clean copy of domain names from pasted text or uploaded local files.
Domain Name Extractor

Extract, dedupe, and export domain names from pasted text or uploaded local files.
Domain Name List Converter

Convert domain names from pasted text or uploaded local files.
Domain Name List Validator

Validate and explain issues in domain names from pasted text or uploaded local files.
Domain Name Normalizer

Normalize, sort, and prepare domain names from pasted text or uploaded local files.
Email Address Deduplicator

Find duplicates and keep one clean copy of email addresses from pasted text or uploaded local files.
Email Address Extractor

Extract, dedupe, and export email addresses from pasted text or uploaded local files.
Email Address List Converter

Convert email addresses from pasted text or uploaded local files.
Email Address List Validator

Validate and explain issues in email addresses from pasted text or uploaded local files.
Email Address Normalizer

Normalize, sort, and prepare email addresses from pasted text or uploaded local files.
.env to JSON Converter

Convert .env environment variables to JSON and back, with quote escaping, export prefix, and optional type inference, all in your browser
Environment Variable Deduplicator

Find duplicates and keep one clean copy of environment variables from pasted text or uploaded local files.
Environment Variable Extractor

Extract, dedupe, and export environment variables from pasted text or uploaded local files.
Environment Variable List Converter

Convert environment variables from pasted text or uploaded local files.
Environment Variable List Validator

Validate and explain issues in environment variables from pasted text or uploaded local files.
Environment Variable Normalizer

Normalize, sort, and prepare environment variables from pasted text or uploaded local files.
File MIME Type Inspector

Upload files and inspect filename, size, browser MIME type, extension, and magic-byte signature locally.
File to Base64 Converter

Upload a small file and convert it to raw Base64 or a data URL locally for embeds, fixtures, and tests.
Gray Code Converter

Decimal, binary and Gray code three ways, gray = n^(n>>1), one click each side, all in your browser
Hex Color Deduplicator

Find duplicates and keep one clean copy of hex colors from pasted text or uploaded local files.
Hex Color Extractor

Extract, dedupe, and export hex colors from pasted text or uploaded local files.
Hex Color List Converter

Convert hex colors from pasted text or uploaded local files.
Hex Color List Validator

Validate and explain issues in hex colors from pasted text or uploaded local files.
Hex Color Normalizer

Normalize, sort, and prepare hex colors from pasted text or uploaded local files.
HTML Form Extractor

Upload or paste HTML and extract forms, methods, actions, fields, labels, required flags, autocomplete, password fields, and security risks.
HTML Link Extractor

Upload HTML and extract anchors, images, scripts, stylesheets, canonicals, and meta URLs into CSV locally.
HTML Minifier

Minify HTML — strip comments, whitespace, optional attributes, inline CSS/JS. 40-60% smaller.
HTML Table to CSV Converter

HTML table to CSV converter — paste HTML or full page source, extract all tables, get CSV/TSV/JSON/Excel-ready output with header detection + colspan/rowspan handling.
HTML Table to JSON

Paste an HTML <table>, get clean JSON, array of objects or 2D array, type inference, browser-only
HTML Table to Markdown

Paste an HTML table, get a clean GitHub-flavoured Markdown table with the |---| separator row, tags stripped, entities decoded and pipes escaped, all in your browser
HTML to JSX

Paste HTML, get React-ready JSX — class becomes className, inline styles become objects, tags self-close. Browser-only.
HTML to Markdown

HTML to Markdown — paste rich content, get clean .md with links, code, tables, lists preserved.
HTTP Header Deduplicator

Find duplicates and keep one clean copy of http headers from pasted text or uploaded local files.
HTTP Header Extractor

Extract, dedupe, and export http headers from pasted text or uploaded local files.
HTTP Header List Converter

Convert http headers from pasted text or uploaded local files.
HTTP Header List Validator

Validate and explain issues in http headers from pasted text or uploaded local files.
HTTP Header Normalizer

Normalize, sort, and prepare http headers from pasted text or uploaded local files.
Image Target Size Compressor

Compress one image to a target KB size locally with quality search, automatic downscaling, preview, and download.
INI Formatter & Validator

Format and validate INI / TOML-like config — sort sections, align equal signs.
INI to JSON Converter

Turn INI / .cfg / .conf into JSON and back, with section nesting, comment stripping and optional type inference, all in your browser
IP to Decimal Converter

IPv4 dotted-quad to 32-bit integer, binary and hex, both directions, browser-only
IPv4 Address Deduplicator

Find duplicates and keep one clean copy of ipv4 addresses from pasted text or uploaded local files.
IPv4 Address Extractor

Extract, dedupe, and export ipv4 addresses from pasted text or uploaded local files.
IPv4 Address List Converter

Convert ipv4 addresses from pasted text or uploaded local files.
IPv4 Address List Validator

Validate and explain issues in ipv4 addresses from pasted text or uploaded local files.
IPv4 Address Normalizer

Normalize, sort, and prepare ipv4 addresses from pasted text or uploaded local files.
IPv6 Address Deduplicator

Find duplicates and keep one clean copy of ipv6 addresses from pasted text or uploaded local files.
IPv6 Address Extractor

Extract, dedupe, and export ipv6 addresses from pasted text or uploaded local files.
IPv6 Address List Converter

Convert ipv6 addresses from pasted text or uploaded local files.
IPv6 Address List Validator

Validate and explain issues in ipv6 addresses from pasted text or uploaded local files.
IPv6 Address Normalizer

Normalize, sort, and prepare ipv6 addresses from pasted text or uploaded local files.
ISO Date Deduplicator

Find duplicates and keep one clean copy of iso dates from pasted text or uploaded local files.
ISO Date Extractor

Extract, dedupe, and export iso dates from pasted text or uploaded local files.
ISO Date List Converter

Convert iso dates from pasted text or uploaded local files.
ISO Date List Validator

Validate and explain issues in iso dates from pasted text or uploaded local files.
ISO Date Normalizer

Normalize, sort, and prepare iso dates from pasted text or uploaded local files.
JS Minifier

Minify JavaScript — strip comments, whitespace, optional name shortening. 40-70% smaller.
JS Obfuscator

Lightly obfuscate JavaScript in the browser: strip comments, remove debugger/console calls, and optionally wrap strings with base64.
JS Object to JSON

Paste a JS object literal or JSON5, get strict JSON: quote bare keys, swap single quotes, strip comments and trailing commas, runs in your browser
JSON Diff

Structural JSON compare — added / removed / changed keys by path, three-colour tree, browser-only
JSON Formatter & Validator

Format, validate, and minify JSON instantly — right in your browser.
JSON Lines Formatter

Validate JSONL line by line, pretty-print it, convert to a JSON array, or export a CSV-like table locally.
JSON Minifier

Minify JSON into a compact single line, optionally sort object keys, and keep everything local.
JSON Schema Inferencer

Paste JSON or NDJSON samples and infer a Draft 2020-12 style schema with types, required fields, formats, enums, and examples.
JSON to C# Class

JSON to C# class or record — paste JSON, get PascalCase properties with System.Text.Json or Newtonsoft attributes, nested classes, nullable T?, init setters, DateTime detection.
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
JSON to Dart Class

JSON to Dart / Flutter class — paste JSON, get final fields, camelCase names, factory fromJson, toJson, null-safe T?, nested classes, and optional @JsonSerializable codegen.
JSON to Go Struct

JSON to Go struct — paste JSON, get typed structs with json tags, exported fields, nested sub-structs, pointers for nullable, int64 and omitempty options.
JSON to Java Class

JSON to Java POJO, record, or Lombok @Data — paste JSON, get camelCase fields with getters/setters, Jackson @JsonProperty or Gson @SerializedName, nested classes, primitive vs boxed inference.
JSON to Kotlin Data Class

JSON to Kotlin data class — paste JSON, get val properties, camelCase fields, nullable T?, nested classes, and kotlinx.serialization @SerialName, Gson @SerializedName, or Moshi @Json annotations.
JSON to Markdown Table

Paste a JSON array of objects, get a clean GitHub-flavored Markdown table. Key union, pipe escaping, alignment, all in your browser.
JSON to PHP Array

JSON to PHP array — paste JSON, get a clean associative or indexed array with short [] or array() syntax, 2/4 indent, trailing comma, and an optional <?php return …; wrapper.
JSON to Protobuf

JSON to Protobuf — paste JSON, get proto3 message definitions with inferred scalar types, incrementing field numbers, snake_case fields, repeated arrays, and named nested messages.
JSON to Python Dataclass

JSON to Python — paste JSON, get @dataclass or Pydantic v2 models with type hints, Optional inference, nested classes, snake_case fields and aliases.
JSON to Query String Converter

Turn a JSON object into a URL query string — repeat, key[], or comma arrays, bracket-nested objects, sorted, skip-empty — and back to JSON, 100% in your browser
JSON to Rust Struct

JSON to Rust struct — paste JSON, get serde-derived structs with snake_case fields, serde rename, Option for nullable, Vec for arrays, nested sub-structs.
JSON to Scala

Paste JSON, get Scala case classes. Nested objects become child classes, arrays become List, null becomes Option, all in your browser.
JSON to SQL Converter

Turn a JSON array into ready-to-run INSERT statements, MySQL / PostgreSQL / SQLite dialects, browser-only
JSON to Swift Codable

JSON to Swift Codable — paste JSON, get struct or class types conforming to Codable, camelCase properties, a CodingKeys enum for non-matching keys, Optional T? for nullable fields, and nested types.
JSON to TSV Converter

Turn a JSON array into tab-separated values you can paste straight into Excel or Google Sheets, with header toggle and safe escaping, all in your browser
JSON to TypeScript Interface

JSON to TypeScript interface — paste JSON, get clean interfaces with union types from arrays, optional vs required detection, root name customizable.
JSON to XML Converter

Convert JSON to clean, indented XML — @attr/#text conventions, custom root, escaped output. Browser-only.
JSON to YAML Converter

Convert JSON to clean YAML — block scalars for multiline strings, optional key sorting, 2/4-space indent, line-numbered errors — browser-only
JSONL to JSON Converter

Turn newline-delimited JSON into a JSON array and back, with bad-line numbers and pick-your-indent — browser only
List to JSON Array

Turn a column of lines into a JSON array, with type inference, dedupe and pretty print, and split it back to lines, all in your browser
Markdown Link Extractor

Upload Markdown and extract inline links, reference links, images, and bare URLs into a local CSV.
Markdown Table Generator

Build Markdown tables visually — add/remove rows, column alignment, paste from Excel / CSV — browser-only
Markdown Table to CSV

Paste a Markdown pipe table, get RFC 4180 CSV: escaped pipes, quoted commas, comma / semicolon / tab delimiters, all in your browser
Markdown to Confluence Converter

Paste Markdown, get Confluence wiki markup — h1. headings, {code} panels, ||tables|| and {quote} blocks, all in your browser
Markdown to HTML

Convert Markdown to clean HTML — headings, lists, code, links, images, tables — instant live preview, browser-only
Markdown to Jira

Paste GitHub-flavored Markdown, get Jira wiki markup back — headings, bold, code blocks, tables, links, all in your browser
Markdown to JSX

Turn Markdown into React-ready JSX — one paste from README to a real component, with class becoming className and code blocks intact. Browser-only.
Markdown to reStructuredText

Convert Markdown to RST for Sphinx and Python docs, with matched heading underlines, double-backtick code and `text <url>`_ links, in the browser
Markdown to Slack

Paste standard Markdown, get Slack mrkdwn back: single-star bold, underscore italic, single-tilde strike, angle-bracket links, all in your browser
Markdown to Textile

Paste GitHub-flavored Markdown, get Textile markup back for Redmine and wikis, with headings, bold, code blocks, links and images converted in your browser
Markdown TOC Generator

Markdown TOC generator — paste your markdown, get a clean table of contents with anchor links.
Morse Code Translator

Text to Morse code and back — encode, decode, audio playback, ITU standard.
OpenAPI Endpoint Auditor

Audit OpenAPI JSON or YAML for endpoint coverage, missing operation IDs, security gaps, and weak response documentation.
Properties ⇄ JSON Converter

Java/Spring .properties to JSON and back, with dotted-key nesting, line continuations and full escape handling, all in your browser
Query String to JSON Converter

Parse a URL query string into JSON and rebuild a query string from JSON — two-way, live, with array + nested object conventions — 100% in your browser
Semantic Version Deduplicator

Find duplicates and keep one clean copy of semantic versions from pasted text or uploaded local files.
Semantic Version Extractor

Extract, dedupe, and export semantic versions from pasted text or uploaded local files.
Semantic Version List Converter

Convert semantic versions from pasted text or uploaded local files.
Semantic Version List Validator

Validate and explain issues in semantic versions from pasted text or uploaded local files.
Semantic Version Normalizer

Normalize, sort, and prepare semantic versions from pasted text or uploaded local files.
SQL Formatter

Format and beautify SQL — supports MySQL, PostgreSQL, BigQuery, SQLite and 17 more dialects.
SQL Minifier

Strip comments and whitespace from SQL — collapse to one compact line, string literals stay untouched, runs entirely in your browser.
SVG to JSX

Paste SVG, get a React component — attributes camelCase, style becomes an object, wrap with {...props} passthrough. Browser-only.
SVG to PNG Converter

Rasterize SVG to PNG in your browser — custom size, 1×/2×/3× HiDPI scale, true transparent background, never uploaded.
Text File Cleaner

Upload a text file and remove BOM, null bytes, trailing spaces, and excessive final blank lines locally.
Text File Line Ending Converter

Upload or paste text and convert CRLF, CR, and LF endings to a consistent LF or CRLF output locally.
Timezone Meeting Planner

Plan meetings across timezones — see when everyone's working hours overlap.
TOML Formatter + Converter

TOML formatter + converter — format/validate TOML 1.0, convert TOML ↔ JSON ↔ YAML, with error line/column.
Traditional ⇄ Simplified Chinese Converter

Traditional ⇄ Simplified Chinese — fast, character-level, no API.
TSV to CSV Converter

Turn tab-separated files into standards-friendly CSV with proper quoting, download, and local processing.
TSV to JSON Converter

Tab-separated data to JSON, header detection, type inference, quoted tab/newline fields, browser-only
Two's Complement Converter

Signed decimal to two's complement binary and hex at 4, 8, 16, 32, 64 bits, with sign-magnitude and one's-complement steps, runs in your browser
TypeScript to Zod Schema

TypeScript to Zod schema converter — paste interface/type, get z.object() schema, supports unions/optionals/nested/generics/enum/Record/Map/Set.
URL Deduplicator

Find duplicates and keep one clean copy of urls from pasted text or uploaded local files.
URL Encoder / Decoder

Encode and decode URL-unsafe characters — query strings, path segments, full URLs — instant, browser-only
URL Extractor

Extract, dedupe, and export urls from pasted text or uploaded local files.
URL List Converter

Convert urls from pasted text or uploaded local files.
URL List Validator

Validate and explain issues in urls from pasted text or uploaded local files.
URL Normalizer

Normalize, sort, and prepare urls from pasted text or uploaded local files.
URL Query Params Extractor

Extract, deduplicate, inspect, copy, and export query parameters from one URL or many URLs locally.
XML Formatter & Validator

Pretty-print, minify, and validate XML in your browser — preserves CDATA, comments, and namespaces.
XML to CSV Converter

Turn repeating XML records into a CSV table, columns are the union of every field, attributes optional, custom delimiter, RFC 4180 escaping, browser-only
XML ⇄ JSON Converter

XML to JSON converter — preserves attributes, nested elements, CDATA. Reversible.
XML to YAML Converter

Paste XML, get clean YAML. Attributes as @ keys, repeated tags as lists, mixed text kept, valid YAML 1.2. Browser only.
YAML Formatter & Validator

Format and beautify YAML — re-indent, validate, minify, sort keys.
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
YAML ⇄ JSON Converter

Convert between YAML and JSON — both directions, pretty-printed, error messages with line numbers — browser-only
YAML to XML Converter

Turn YAML into clean, indented XML. Keys become elements, lists repeat, @keys become attributes, every value escaped. Browser-only.

Angle Converter

Base64 Encoder & Decoder

Base64 to File Converter

BBCode to HTML Converter

Chinese Pinyin Converter

Coordinate Converter

Cron Expression Explainer — Decode Any Cron + Next 20 Runs

Crontab Helper — Visual Builder & Explainer

CSS Formatter & Minifier

CSS Minifier

CSS to Style Object

CSV Column Extractor

CSV Data Quality Profiler

CSV Deduplicator

CSV Filter

CSV Header Normalizer

CSV Sorter

CSV Stats Summary

CSV to HTML Table

CSV ⇄ JSON Converter

CSV to Markdown Table

CSV to SQL Converter

CSV to TSV Converter

CSV to XML Converter

CSV to YAML Converter

CSV Transposer

Data Storage Converter

Domain Name Deduplicator

Domain Name Extractor

Domain Name List Converter

Domain Name List Validator

Domain Name Normalizer

Email Address Deduplicator

Email Address Extractor

Email Address List Converter

Email Address List Validator

Email Address Normalizer

.env to JSON Converter

Environment Variable Deduplicator

Environment Variable Extractor

Environment Variable List Converter

Environment Variable List Validator

Environment Variable Normalizer

File MIME Type Inspector

File to Base64 Converter

Gray Code Converter

Hex Color Deduplicator

Hex Color Extractor

Hex Color List Converter

Hex Color List Validator

Hex Color Normalizer

HTML Form Extractor

HTML Link Extractor

HTML Minifier

HTML Table to CSV Converter

HTML Table to JSON

HTML Table to Markdown

HTML to JSX

HTML to Markdown

HTTP Header Deduplicator

HTTP Header Extractor

HTTP Header List Converter

HTTP Header List Validator

HTTP Header Normalizer

Image Target Size Compressor

INI Formatter & Validator

INI to JSON Converter

IP to Decimal Converter

IPv4 Address Deduplicator

IPv4 Address Extractor

IPv4 Address List Converter

IPv4 Address List Validator

IPv4 Address Normalizer

IPv6 Address Deduplicator

IPv6 Address Extractor

IPv6 Address List Converter

IPv6 Address List Validator

IPv6 Address Normalizer

ISO Date Deduplicator

ISO Date Extractor