All Developer Tools
114+ free, browser-based utilities for developers, spanning 12 categories — JSON, CSV and data, text, encoding and decoding, hashing and crypto, JWT and API helpers, color and design, date and time, and code generators.
Every tool runs entirely in your browser. There is no login, no upload, and no cost — your data never leaves your device, so you can safely format, convert, validate, encode, hash, and generate without sending anything to a server. Search below, filter by category, or browse the full directory of tools further down the page.
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The complete list of every utility on CodeUtilityKit, organized by category. Each tool is free, private, and works instantly in your browser.
JSON Tools
(21)Format, validate, convert, and manipulate JSON data.
- JSON to CSV — Convert JSON to CSV
- CSV to JSON — Convert CSV to JSON
- JSON Formatter — Beautify & format JSON
- JSON Viewer — View JSON as tree
- JSON Validator — Validate JSON syntax
- JSON to TypeScript — JSON → TypeScript interfaces
- JSON Minifier — Minify & compress JSON
- YAML to JSON — Convert YAML to JSON
- JSON to YAML — Convert JSON to YAML
- JSON Diff — Compare two JSON objects
- JSON Schema Generator — Generate JSON Schema
- JSON Editor — Edit JSON with live validation
- XML to JSON — Convert XML to JSON
- JSON Path Tester — Test JSONPath expressions
- JSON to XML — Convert JSON to XML
- JSON Schema Validator — Validate JSON against schema
- JSON Array to Table — JSON array as HTML table
- JSON Escape — Escape JSON strings
- JSON Unescape — Unescape JSON strings
- JSON Key Extractor — Extract all JSON keys
- JSON Sorter — Sort JSON keys
CSV & Data Tools
(12)View, edit, convert, and transform CSV and tabular data.
- CSV Viewer — View CSV as table
- CSV to Markdown Table — CSV to Markdown table
- CSV to TSV — Convert CSV to TSV
- TSV to CSV — Convert TSV to CSV
- CSV Formatter — Format & clean CSV data
- CSV to Table — Convert CSV to table
- CSV Sorter — Sort CSV by column
- CSV Validator — Validate CSV data
- CSV Duplicate Row Remover — Remove duplicate CSV rows
- CSV Filter — Filter CSV rows
- CSV Delimiter Converter — Change CSV delimiter
- CSV Column Extractor — Extract CSV columns
Text Tools
(14)Manipulate, transform, and analyze text in various ways.
- Password Generator — Generate secure passwords
- Word Counter — Count words & characters
- Character Counter — Count text characters
- Lorem Ipsum Generator — Generate placeholder text
- Text Diff Checker — Compare two texts
- Text Case Converter — Convert text case
- Slug Generator — Generate URL slugs
- Duplicate Line Remover — Remove duplicate lines
- Find and Replace — Find & replace in text
- Random String Generator — Generate random strings
- Text Sorter — Sort text lines
- Whitespace Remover — Remove extra whitespace
- Text Reverser — Reverse text or words
- Duplicate Word Remover — Remove duplicate words
Encoding & Decoding
(14)Encode and decode data in Base64, URL, HTML, and more.
- JWT Decoder — Decode JWT tokens
- Base64 Decoder — Decode from Base64
- Base64 Encoder — Encode to Base64
- QR Code Generator — Generate QR codes
- URL Decoder — Decode URL strings
- URL Encoder — Encode URL strings
- Binary to Text — Binary to readable text
- HTML Encoder — Encode HTML entities
- HTML Decoder — Decode HTML entities
- Text to Binary — Text to binary
- Hex to Text — Hex to readable text
- Text to Hex — Text to hexadecimal
- Unicode Decoder — Decode Unicode escapes
- Unicode Encoder — Encode to Unicode
Hashing & Crypto
(11)Generate and verify cryptographic hashes and identifiers.
- Bcrypt Hash Generator — Generate bcrypt hashes
- SHA256 Generator — Generate SHA256 hash
- UUID Generator — Generate UUIDs
- MD5 Generator — Generate MD5 hash
- SHA1 Generator — Generate SHA1 hash
- Bcrypt Compare — Compare bcrypt hash
- SHA512 Generator — Generate SHA512 hash
- HMAC Generator — Generate HMAC signatures
- Nano ID Generator — Generate Nano IDs
- Checksum Generator — Generate file checksums
- Hash Compare — Compare two hashes
JWT & API Tools
(9)Decode, inspect, and build JWT tokens and API utilities.
- HTTP Status Code Lookup — Look up HTTP status codes
- UTM Builder — Build UTM tracking URLs
- cURL to Fetch — Convert cURL to Fetch
- cURL to Axios — Convert cURL to Axios
- Basic Auth Generator — Generate Basic Auth headers
- JWT Expiration Checker — Check JWT expiration
- URL Query Parser — Parse URL query strings
- URL Query Builder — Build URL query strings
- Bearer Token Parser — Parse Bearer tokens
PDF & Document Tools
(8)Preview, format, and convert document and code formats.
- Markdown to HTML — Convert Markdown to HTML
- JavaScript Formatter — Format JavaScript code
- CSS Formatter — Format CSS code
- HTML Formatter — Format HTML code
- JavaScript Minifier — Minify JavaScript code
- CSS Minifier — Minify CSS code
- Markdown Previewer — Preview Markdown
- HTML Viewer — Preview HTML code
Color & Design Tools
(8)Convert color formats and generate CSS design values.
- HEX to RGB — HEX to RGB converter
- RGB to HEX — RGB to HEX converter
- Color Picker — Pick and convert colors
- Gradient Generator — Generate CSS gradients
- CSS Box Shadow Generator — Generate CSS box shadows
- Border Radius Generator — Generate border radius CSS
- CSS Unit Converter — Convert CSS units
- HEX to HSL — HEX to HSL converter
Date & Time Tools
(5)Convert, calculate, and format dates, times, and schedules.
- Timestamp Converter — Convert timestamps
- Date Difference Calculator — Calculate date difference
- Cron Expression Builder — Build cron expressions
- Cron Expression Parser — Parse cron expressions
- ISO Date Converter — Convert ISO date formats
Developer Generators
(8)Generate code snippets, configs, and random values.
- Regex Tester — Test regex patterns
- Random Number Generator — Generate random numbers
- Meta Tag Generator — Generate HTML meta tags
- Open Graph Preview — Preview Open Graph tags
- Robots.txt Generator — Generate robots.txt
- API Key Generator — Generate API keys
- Regex Generator — Generate regex patterns
- Sitemap Generator — Generate XML sitemap
Diagram Tools
(1)Turn plain text into flowcharts, sequence diagrams, and more.
- Diagram Generator — Text to flowcharts & diagrams
SEO & Domain Tools
(3)Check domain authority, age, and WHOIS data from live sources.
- Domain Rating Checker — Check Domain Rating (DR)
- Domain Age & WHOIS Checker — Check domain age & WHOIS
- DNS & Email Records Checker — Look up DNS & email records