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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.

XML → JSON Converter

Convert XML documents to structured JSON with configurable number/boolean parsing.

JSON → XML Converter

Convert a JSON object or array into well-formed, indented XML with a custom root element.

JSON → TypeScript Interface

Generate a TypeScript interface or type from any JSON payload, with optional and readonly toggles.

JSON Diff / Compare

Compare two JSON documents structurally or as text, with per-key added/removed/changed stats.

JSONPath Tester

Test JSONPath expressions against JSON live, with wildcard, index, slice, and recursive descent support.

JSON Schema Generator

Infer a draft-07 or 2020-12 JSON Schema directly from a sample JSON payload.

JSON Escape / Unescape

Escape a raw string into a JSON-safe literal, or unescape a JSON string literal back to plain text.

JSON Tree Viewer

Explore large JSON documents as a collapsible tree with type badges, path copying, and expand/collapse controls.

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.

Binary → Text Converter

Convert text to 8-bit binary and back, with full UTF-8 support and configurable separators.

Image ↔ Base64 Converter

Convert images to Base64 data URIs and back, with drag-and-drop upload and instant preview.

Unicode Escape / Unescape

Escape text to \uXXXX, \UXXXXXXXX, or HTML entity form, and unescape it back to readable characters.

ROT13 / Caesar Cipher

Encode and decode ROT13 text instantly, or use a configurable Caesar cipher with any shift 1-25.

Morse Code Translator

Translate text to Morse code and back, with optional audio playback of the dots and dashes.

Punycode Converter

Convert internationalized domain names between Unicode and Punycode (xn--) ASCII form.

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.

JWT Generator

Sign a JWT with HS256/384/512, a custom payload, expiry, issuer, and subject — right in your browser.

AES Encrypt / Decrypt

Encrypt and decrypt text with AES-256-GCM using browser-native Web Crypto and PBKDF2 key derivation.

Basic Auth Header Generator

Generate a properly UTF-8-safe Basic Authentication header from a username and password.

Random Number Generator

Generate cryptographically strong random integers or decimals in bulk, with range, duplicate, and sort controls.

RSA Key Pair Generator

Generate RSA public/private key pairs (1024/2048/4096-bit) as PEM, entirely in your browser.

.htpasswd Generator

Generate Apache/Nginx .htpasswd lines in bcrypt, APR1-MD5, or SHA1 format — entirely in your browser.

BIP39 Mnemonic Generator

Generate and validate BIP39 mnemonic seed phrases (12/18/24 words) with entropy and seed hex — client-side only.

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.

Text Diff / Compare

Compare two blocks of text line by line, word by word, or sentence by sentence, with additions and deletions highlighted.

Slug Generator

Turn any title into a clean, URL-safe slug — lowercase, hyphenated, and accent-free.

Remove Duplicate Lines

Strip repeated lines from a list or text block, keeping either the first or last occurrence.

Whitespace Trimmer / Remover

Clean up messy text by trimming, collapsing, or stripping spaces, tabs, and blank lines.

Reverse Text / Words

Reverse text by character, word, or line order — with correct handling of emoji and multi-byte characters.

Add / Remove Line Numbers

Prefix every line with a sequential number, or strip existing numbering back out, entirely client-side.

Number → Words Converter

Spell out any integer as English words — Western or Indian (lakh/crore) numbering, with an ordinal mode.

Markdown Editor + Live Preview

A split-pane Markdown editor with live HTML preview, a formatting toolbar, and one-click .md download.

Markdown Table Generator

Build a Markdown table from a spreadsheet-style grid or imported CSV, with per-column alignment.

List Randomizer / Shuffler

Shuffle a list into random order, or draw N random picks, using a cryptographically unbiased Fisher-Yates shuffle.

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.

Cron Expression Builder

Build a valid cron expression visually from minute, hour, day, month, and weekday fields — with a human-readable summary and next 10 run times.

Regex Cheat Sheet

Searchable reference for regex anchors, character classes, quantifiers, groups, lookaround, and flags — with copyable syntax and live examples.

HTML Formatter / Beautifier

Beautify minified or messy HTML with configurable indentation, wrapping, and a one-click minify toggle.

HTML Minifier / Optimizer

Shrink HTML by stripping comments, collapsing whitespace, and minifying inline CSS/JS — with a live savings summary.

JavaScript Beautifier

Beautify minified or unformatted JavaScript with configurable indentation and spacing — live, in your browser.

JavaScript Minifier

Compress and mangle JavaScript with terser — the same minifier used by Webpack and Vite — right in your browser.

SQL Formatter / Beautifier

Beautify and standardize SQL queries across MySQL, PostgreSQL, SQLite, BigQuery, and Spark dialects.

XML Formatter / Beautifier

Beautify, validate, and minify XML with configurable indentation and self-closing tag control.

YAML Formatter / Validator

Format, validate, and reindent YAML with precise error locations — powered by js-yaml, in your browser.

TOML Formatter / Validator

Validate and consistently reformat TOML config files — using @iarna/toml, entirely client-side.

GraphQL Formatter

Pretty-print GraphQL queries, mutations, and schema SDL with consistent spacing — client-side, using the graphql package.

HTML → JSX Converter

Convert HTML markup to React JSX — className, camelCase attributes, self-closed void tags, and inline style objects.

HTML Cleaner / Tag Stripper

Strip tags, scripts, styles, comments, and unwanted attributes from HTML — entirely in your browser.

Prettier Playground

Format JavaScript, TypeScript, HTML, CSS, Markdown, and JSON with real Prettier — no install required.

Code Diff Viewer

Compare two blocks of code or text line-by-line, word-by-word, or character-by-character.

HTML Table Generator

Build an HTML table from a spreadsheet-style grid, with Bootstrap styling and a live preview.

Unix Timestamp Converter

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

Roman Numeral Converter

Convert integers to Roman numerals and back, with strict notation validation.

Data Size Converter

Convert between bits, bytes, KB, MB, GB, TB, and PB — decimal or binary, all units at once.

Color Code Converter

Convert between HEX, RGB, and HSL color formats with auto-detection and a live preview.

Timezone Converter

Convert a date and time across up to 5 timezones at once, with UTC offset and DST status.

CSV → SQL Insert Generator

Turn CSV data into batched INSERT statements for MySQL, PostgreSQL, SQLite, or SQL Server.

CSV → Markdown / HTML Table

Convert CSV into a Markdown table, an HTML table, or a padded plain-text table, live.

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.

Nginx Config Generator

Generate a complete Nginx server block — SSL, reverse proxy, PHP-FPM, gzip, caching, and security headers.

Dockerfile Generator

Generate a production-ready Dockerfile and matching .dockerignore for Node, Python, Go, Java, Ruby, PHP, and more.

Fake / Mock Data Generator

Generate realistic mock JSON, CSV, SQL, or Markdown test data with a custom field schema.

.gitignore Generator

Merge real .gitignore templates for Node, Python, React, macOS, and more into one file.

License Generator

Pick a license, fill in your name and year, and get a ready-to-commit LICENSE file.

README Generator

Build a polished README.md with live preview, badges, and one-click download.

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.

REST API Tester

Send HTTP requests and inspect status, headers, and body — a lightweight Postman alternative in your browser.

Date Difference Calculator

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