Every developer tool, in one place.

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.

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.

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.

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 Tester / Debugger

Live regex testing with match highlighting, captured groups, and flag controls.

Cron Expression Parser

Translate cron expressions into plain English — with a library of common examples.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and back — supports seconds and milliseconds.

Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal instantly.

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.

URL Parser & Inspector

Decompose any URL into protocol, host, path, query params, and hash — with per-field copy.

User Agent Parser

Parse user agent strings to detect browser, engine, OS, device type, and CPU architecture.

Date Difference Calculator

Calculate the exact difference between two dates in days, weeks, months, years, hours, and minutes.