Developer Tools
Built Right
Free, browser-only tools for the things developers actually do — random strings with the right entropy, UUIDs that sort, CSV parsing that handles quoted fields, HTML entity decoding that doesn't break on emoji. Sane presets, real docs, no telemetry.
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Hand-tuned · deep docs · presetsRandom String Generator
Passwords, API tokens, hex IDs — with the right entropy
Built-in presets for each format. CSPRNG only, never Math.random. Live entropy badge.
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UUID Generator
v4 or v7 (sortable) — the modern default for DB keys
Bulk generation, with/without hyphens, uppercase option. Explains when to pick v7 vs v4.
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CSV to JSON
Handles quoted fields, embedded commas, BOM, and odd delimiters
RFC 4180 compliant. Auto-detect delimiter. Header/no-header. Optional type coercion.
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HTML Decoder
Decode &, ", 😀 — every entity flavor
Named, decimal, and hex entities. Encode mode for XSS-safe HTML. Browser DOM-based for full coverage.
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Webhook Secret Generator
GitHub, Stripe, Slack — formatted for each platform
Web Crypto API. Per-platform key length and prefix conventions. HMAC verification snippets.
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JSON Tools
6 toolsJSON Formatter
Beautify and format JSON with syntax highlighting and validation.
JSON Validator
Validate JSON syntax and structure instantly with detailed error messages.
JSON Minifier
Minify and compress JSON by removing all whitespace and formatting.
JSON to CSV
Convert JSON arrays and objects to CSV format for spreadsheets.
JSON to XML
Convert JSON data to well-formed XML format instantly.
JSON Diff
Compare two JSON objects and highlight the differences between them.
Text Tools
5 toolsText Diff
Compare two text blocks and see the differences highlighted line by line.
Remove Duplicate Lines
Remove duplicate lines from text and keep only unique lines.
Text Sorter
Sort lines of text alphabetically, numerically, or by length.
Word Counter
Count words, characters, sentences, and paragraphs in your text.
Find & Replace
Find and replace text with support for regex patterns.
Encoding
8 toolsBase64 Encoder
Encode text or binary data to Base64 format instantly.
Base64 Decoder
Decode Base64 encoded strings back to readable text instantly.
URL Encoder
Encode URLs and query strings for safe use in HTTP requests.
URL Decoder
Decode percent-encoded URL strings back to human-readable format.
HTML Encoder
Encode HTML special characters to safe HTML entities.
JWT Decoder
Decode and inspect JWT tokens — header, payload, and signature.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text.
Data Tools
1 toolsXML Tools
3 toolsConverters
12 toolsText to Binary
Convert text to binary (0s and 1s) representation.
Binary to Text
Convert binary (0s and 1s) back to readable text.
HEX to Text
Convert hexadecimal values to readable text.
Text to HEX
Convert text to hexadecimal representation.
Unicode Converter
Convert text to Unicode code points and escape sequences.
ASCII Converter
Convert between text and ASCII decimal/hex codes.
Morse Code Converter
Convert text to Morse code and Morse code back to text.
ROT13 Encoder/Decoder
Encode or decode text using the ROT13 cipher (works both ways).
Base32 Encoder/Decoder
Encode and decode data using Base32 encoding.
Base58 Encoder/Decoder
Encode and decode data using Base58 encoding (used in Bitcoin/crypto).
Charset Converter
Inspect and convert between character encodings: UTF-8, Latin-1, ASCII.
URL Slug Generator
Generate SEO-friendly URL slugs from any text.
Hashing
7 toolsMD5 Hash Generator
Generate MD5 hashes from text or files. Note: MD5 is not cryptographically secure.
SHA1 Hash Generator
Generate SHA-1 hashes from any text. Note: SHA-1 is deprecated for security use.
SHA256 Hash Generator
Generate secure SHA-256 hashes from any text using the Web Crypto API.
SHA512 Hash Generator
Generate secure SHA-512 hashes from any text using the Web Crypto API.
HMAC Generator
Generate HMAC authentication codes using SHA-256 or SHA-512 with a secret key.
Hash Compare Tool
Compare two hash values to verify integrity or check if passwords match.
File Checksum Generator
Generate SHA-256, SHA-512, or SHA-1 checksums for any file to verify integrity.
Generators
14 toolsPassword Generator
Generate strong, random passwords with custom length and character sets.
Password Strength Checker
Check the strength and security of your password with entropy analysis.
Password Entropy Calculator
Calculate the exact entropy in bits of any password or string.
Random Number Generator
Generate random numbers in any range, single or bulk.
Random Token Generator
Generate cryptographically secure random tokens for APIs, sessions, and secrets.
Random API Key Generator
Generate random API keys in various formats ready to use in your projects.
Random Color Generator
Generate random colors in HEX, RGB, HSL, and CSS formats.
Random HEX Color Generator
Generate random HEX color codes for CSS and design work.
Random IP Generator
Generate random IPv4 and IPv6 addresses for testing and development.
Random MAC Address Generator
Generate random MAC addresses for network testing and development.
Random JSON Generator
Generate random JSON objects and arrays for testing and mocking APIs.
Random List Generator
Generate random lists of items — numbers, strings, or custom values.
Random Picker
Paste a list of names or items and pick one or more at random.
Fake Name Generator
Generate random fake names and personal data for testing and development.
Text Transform
4 toolsCase Converter
Convert text between uppercase, lowercase, title case, camelCase, snake_case and more.
Text Cleaner
Remove extra spaces, line breaks, special characters and clean up messy text.
Text Reverser
Reverse text characters, words, or lines.
Add Prefix/Suffix
Add a prefix, suffix, or both to each line of text.
Text Analysis
6 toolsWord Frequency Counter
Count how many times each word appears in your text.
Keyword Density Checker
Analyze keyword density in text for SEO optimization.
Keyword Extractor
Extract key terms and phrases from text automatically.
Entity Extractor
Extract emails, URLs, phone numbers, hashtags, and mentions from text.
Email Extractor
Extract all email addresses from any block of text.
URL Extractor
Extract all URLs and links from any block of text or HTML.
Code Tools
11 toolsHTML Minifier
Minify HTML by removing whitespace, comments, and unnecessary characters.
HTML Beautifier
Beautify and format HTML with proper indentation.
CSS Minifier
Minify CSS by removing whitespace, comments, and unnecessary characters.
CSS Beautifier
Beautify and format CSS with proper indentation and structure.
JavaScript Minifier
Minify JavaScript code by removing whitespace and comments.
JavaScript Beautifier
Beautify and format JavaScript code with proper indentation.
SQL Formatter
Format and beautify SQL queries with proper indentation and keyword highlighting.
Regex Tester
Test regular expressions against text with match highlighting and group capture.
Markdown to HTML
Convert Markdown text to HTML with live preview.
HTML to Markdown
Convert HTML markup to clean Markdown text.
Log Parser
Parse and analyze server logs, application logs, and structured log files.
Guides
The Complete JSON Guide
Everything you need to know about JSON — format, validation, tools, and best practices.
Encoding & Decoding Guide
Master Base64, URL, HTML encoding and decoding with practical examples.
Data Tools Guide
A comprehensive guide to transforming, converting, and manipulating data formats.
Text Tools Guide
How to efficiently process, clean, and transform text data with developer tools.