Every developer tool, in one place.
100+ free utilities that run entirely in your browser. No sign-up, no uploads, no server.
JSON & Data Formats
6 tools
JSON Formatter / Validator
Beautify, validate, and explore JSON with error line numbers and collapsible nodes.
JSON Minifier
Strip whitespace from JSON to produce the smallest valid payload for APIs and storage.
JSON → YAML Converter
Convert JSON to YAML format instantly — using js-yaml, entirely in your browser.
YAML → JSON Converter
Convert YAML to formatted JSON — parses all YAML types, runs in your browser.
JSON → CSV Converter
Convert a JSON array of objects to CSV with automatic header detection — client-side.
CSV → JSON Converter
Convert CSV data to a JSON array of objects with automatic header detection.
Encoding & Decoding
4 tools
Base64 Encode / Decode
Encode text or binary to Base64 and decode it back — with full UTF-8 support.
URL Encode / Decode
Encode and decode URL components and full URLs with percent-encoding, instantly.
HTML Entity Encode / Decode
Encode special characters as HTML entities and decode them back — all in your browser.
Hex ↔ Text Converter
Convert text to hexadecimal bytes and decode hex back to text — with full UTF-8 support.
Crypto, Hashing & Security
7 tools
SHA Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes using browser-native Web Crypto.
UUID Generator
Generate UUID v1, v4, and v7 identifiers in bulk — using crypto-random browser APIs.
Password Generator
Generate strong random passwords with configurable length, charset, and an entropy meter.
MD5 Hash Generator
Generate MD5 hashes for checksums and legacy compatibility — runs entirely in your browser.
JWT Decoder / Debugger
Decode JWT headers and payloads, inspect claims, and optionally verify HS256 signatures — all in your browser.
HMAC Generator
Generate HMAC-SHA256, HMAC-SHA512 and other HMAC digests using browser Web Crypto.
Bcrypt Hash & Verify
Hash passwords with bcrypt and verify hashes — using bcryptjs, entirely in your browser.
Text & String
7 tools
Case Converter
Convert text between camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE, and more.
Word / Char / Line Counter
Count words, characters, lines, sentences, and estimate reading time — instantly, client-side.
Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text — words, sentences, or paragraphs, entirely in your browser.
Sort Lines
Sort lines alphabetically, numerically, in reverse, or shuffle randomly — with duplicate removal.
Markdown → HTML
Convert Markdown to HTML — with live preview, using the marked library in your browser.
HTML → Markdown
Convert HTML to Markdown — using Turndown, entirely in your browser.
Find & Replace
Find and replace text with literal strings or regex patterns — with case sensitivity control.
Regex & Cron
2 tools
Converters
2 tools
Generators
3 tools
ULID Generator
Generate sortable ULIDs (Universally Unique Lexicographically Sortable Identifiers) in bulk.
Nano ID Generator
Generate compact, URL-safe Nano IDs with custom alphabet and size — using the nanoid library.
Random String Generator
Generate random strings with custom charsets and presets for API keys, tokens, and PINs.
Network & Web
2 tools
Date & Time
1 tools