All Developer Tools

110+ free, browser-based utilities for developers, spanning 10 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.

Loading tools...

Browse all tools by category

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
JSON Formatter — Beautify & format JSON
CSV to JSON — Convert CSV to JSON
JSON Validator — Validate JSON syntax
JSON to TypeScript — JSON → TypeScript interfaces
JSON Viewer — View JSON as tree
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 to Markdown Table — CSV to Markdown table
CSV to TSV — Convert CSV to TSV
CSV Viewer — View CSV as table
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
HTML Decoder — Decode HTML entities
HTML Encoder — Encode HTML entities
Text to Binary — Text to binary
Binary to Text — Binary to readable text
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.

UUID Generator — Generate UUIDs
MD5 Generator — Generate MD5 hash
SHA256 Generator — Generate SHA256 hash
Bcrypt Hash Generator — Generate bcrypt hashes
SHA1 Generator — Generate SHA1 hash
SHA512 Generator — Generate SHA512 hash
HMAC Generator — Generate HMAC signatures
Nano ID Generator — Generate Nano IDs
Checksum Generator — Generate file checksums
Bcrypt Compare — Compare bcrypt hash
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