Developer & Tech Utilities
116+ free browser-based tools. JSON, regex, Base64, color, units, and more — all run locally, no data ever leaves your browser.
116+
Tools
5
Categories
100%
Free
0
Data stored
Formatters & Validators
(11)JSON Formatter
Format, validate, and minify JSON with syntax highlighting.
XML Formatter
Prettify and validate XML documents instantly.
SQL Formatter
Format and beautify SQL queries for better readability.
CSS Formatter
Prettify and minify CSS stylesheets.
Markdown Preview
Write Markdown and see a live rendered HTML preview.
HTML Formatter
Prettify and minify HTML markup. All processing in your browser.
JSON Schema Generator
Generate a JSON Schema from any JSON object automatically.
YAML Validator
Validate and format YAML files with clear error messages.
JSON Schema Validator
Validate JSON data against a JSON Schema (Draft-07).
JavaScript Minifier
Minify JavaScript code by removing comments and collapsing whitespace.
SVG Minifier
Remove comments, metadata, and whitespace from SVG files to reduce file size.
Encoders & Decoders
(9)Base64 Encoder / Decoder
Encode or decode Base64 strings and files.
URL Encoder / Decoder
Encode or decode URL components and query strings.
JWT Decoder
Decode and inspect JWT tokens — header, payload, and signature.
JWT Generator
Generate signed JWT tokens with custom payload and secret.
HTML Entity Encoder
Encode special characters to HTML entities and decode them back.
String Escape / Unescape
Escape or unescape JSON, JavaScript, and SQL strings.
Base32 Encoder / Decoder
Encode text to Base32 (RFC 4648) or decode Base32 back to text.
Morse Code
Encode text to Morse code (dots and dashes) or decode Morse code back to text.
Text Encryptor
Encrypt and decrypt text with AES-256-GCM — fully client-side, nothing leaves your browser.
Converters
(24)JSON ↔ YAML
Convert between JSON and YAML formats instantly.
CSV ↔ JSON
Convert CSV data to JSON and back with header support.
JSON → TypeScript
Generate TypeScript interfaces and types from a JSON object.
Color Converter
Convert colors between HEX, RGB, HSL, and CSS names.
Number Base Converter
Convert numbers between Binary, Octal, Decimal, and Hexadecimal.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
XML → JSON
Convert XML documents to JSON format instantly.
Date Calculator
Calculate age, days between dates, and add/subtract durations.
Unit Converter
Convert length, weight, temperature, and more between common units.
URL Parser
Break any URL into its components: protocol, host, path, query params, and hash.
Markdown → HTML
Convert a Markdown table or document to clean HTML markup.
Image → Base64
Encode images to Base64 data URLs for embedding in HTML and CSS.
Text ↔ Binary
Convert text to binary (0s and 1s) and back.
Aspect Ratio Calculator
Calculate and scale aspect ratios for images and video.
HTML → Markdown
Convert HTML markup to clean, readable Markdown text.
TOML ↔ JSON
Convert between TOML and JSON configuration formats.
Timezone Converter
Convert a date and time between any two IANA timezones.
HTML to JSX
Convert HTML markup to React JSX — renames attributes, self-closes void elements, converts styles.
cURL to Code
Convert a cURL command to JavaScript fetch, Axios, Python requests, or Go.
XML ↔ YAML
Convert between XML and YAML formats.
SVG to PNG Converter
Convert SVG files to PNG at 1×, 2×, or 3× scale — paste SVG code or drop a file.
Crypto Unit Converter
Convert between Bitcoin units (BTC, mBTC, Satoshi) and Ethereum units (ETH, Gwei, Wei).
Age Calculator
Calculate exact age in years, months, and days plus total weeks, hours, and next birthday.
World Clock
Live clocks for multiple timezones — add any IANA timezone and watch them tick in real time.
Generators
(35)Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text.
UUID Generator
Generate RFC-compliant UUIDs (v4 and v7) in bulk.
Password Generator
Generate strong, customizable passwords with entropy score.
Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text by words, sentences, or paragraphs.
QR Code Generator
Generate QR codes from any text or URL and download as PNG.
Fake Data Generator
Generate realistic fake names, emails, addresses, and more for testing.
CSS Gradient Generator
Build linear and radial CSS gradients visually and copy the code.
CSS Box Shadow Generator
Create and preview CSS box shadows visually with live code output.
Color Palette Generator
Generate harmonious color palettes from a base color.
UTM Builder
Build UTM-tagged URLs for tracking marketing campaigns.
Slug Generator
Convert any text into a URL-safe slug for use in paths and IDs.
Markdown Table Generator
Build Markdown tables visually and copy the formatted output.
Meta Tag Generator
Generate SEO and Open Graph meta tags for HTML <head>.
CSS Flexbox Playground
Build CSS flexbox layouts visually and copy the generated CSS.
Color Picker
Pick colors visually using HSL/RGB sliders and copy in HEX, RGB, or HSL format.
HMAC Generator
Generate HMAC message authentication codes using SHA-256, SHA-1, or SHA-512.
TOTP Generator
Generate Time-based One-Time Passwords (RFC 6238) — compatible with Google Authenticator.
CSS Grid Playground
Build CSS grid layouts visually — set columns, rows, gap, alignment and copy the generated CSS.
.gitignore Generator
Generate a .gitignore file for any language, framework, or OS with one click.
Web Manifest Generator
Generate a web app manifest.json for PWA — set name, icons, colors, display mode.
Robots.txt Generator
Build a robots.txt file visually — add allow/disallow rules per bot and add a sitemap URL.
CORS Headers Generator
Generate CORS header config for Apache, Nginx, Node/Express with allowed origins and methods.
NPM Script Builder
Build your package.json scripts section visually — pick common dev, build, test, and lint tasks.
CSS Cubic Bezier
Create and preview CSS cubic-bezier timing functions with a draggable interactive curve editor.
SVG Blob Creator
Generate organic blob SVG shapes with randomness controls — copy or download the SVG.
Tailwind Color Generator
Generate a full 10-shade Tailwind CSS color scale from any base color.
Placeholder Image
Generate placeholder images with custom dimensions, colors, and text — download as PNG.
ASCII Art Generator
Convert text to ASCII art in multiple font styles — Big, Banner, Block, Bubble, and more.
Image Resizer
Resize and crop images in the browser — set exact dimensions, lock aspect ratio, choose format.
Image Compressor
Compress JPEG, PNG, and WebP images in the browser — adjust quality and download instantly.
Favicon Generator
Generate all favicon sizes (16×16 to 512×512) from any image — download with HTML snippet.
WiFi QR Generator
Generate a scannable QR code that connects phones to WiFi — no typing required.
Code to Image
Turn your code snippet into a beautiful shareable image with syntax highlighting and custom themes.
Color Shades Generator
Generate a full 11-step shade palette (50–950) from any base color with Tailwind and CSS output.
CSS Clip Path Generator
Visually build polygon, circle, and ellipse clip-paths with a drag-and-drop editor.
Testers & Analysis
(37)Regex Tester
Test regular expressions with live match highlighting.
CRON Expression Tester
Validate CRON expressions and preview the next scheduled run times.
Text Diff Viewer
Compare two text blocks side by side and highlight differences.
Word & Character Counter
Count words, characters, lines, sentences, and estimate reading time.
Text Case Converter
Convert text between camelCase, snake_case, PascalCase, kebab-case, and more.
Byte Size Calculator
Calculate the UTF-8 byte size of any string or payload.
HTTP Status Reference
Quick reference for all HTTP status codes with descriptions.
User-Agent Parser
Parse and decode browser and device User-Agent strings.
JSON Path Tester
Test JSONPath expressions against JSON data and inspect results.
IP Subnet Calculator
Calculate network address, broadcast, host range, and CIDR notation.
Chmod Calculator
Convert Unix file permissions between symbolic and numeric modes.
Semver Analyzer
Parse, compare, and validate Semantic Versioning strings.
Line Sorter
Sort, deduplicate, and shuffle lines of text.
Find & Replace
Find and replace text with plain text or regex patterns.
Percentage Calculator
Calculate percentages, discounts, increases, and decreases.
CSV Viewer
Upload and preview CSV files as an interactive table.
JSON Diff
Compare two JSON objects and highlight added, removed, and changed keys.
Password Strength Checker
Analyze password strength, entropy, and estimated crack time.
Readability Score
Analyze text readability with Flesch-Kincaid and other scores.
ASCII Table
Full ASCII and extended character reference table with hex, decimal, and binary.
Color Contrast Checker
Check foreground/background color contrast ratios against WCAG AA and AAA.
Number Formatter
Format numbers with locale, currency, decimals, and thousands separators.
ENV File Parser
Parse .env files — extract key/value pairs, detect syntax errors, and export as JSON.
CSS Specificity Calculator
Calculate the specificity score (IDs, classes, elements) for any CSS selector.
Text Repeater
Repeat any text N times with a custom separator.
Open Graph Preview
Preview how your page looks when shared on Twitter/X, LinkedIn, and Facebook.
Diff Checker
Compare two texts side by side with line numbers and character-level highlighting.
Code Line Counter
Paste code and count total, blank, comment, and code lines with a visual breakdown.
Emoji Picker
Search and copy emojis by name or keyword — with categories, recent history, and one-click copy.
Data Sanitizer
Remove or redact PII from text — emails, phone numbers, credit cards, IPs, API keys, and more.
File Metadata Viewer
View EXIF data, dimensions, GPS, magic bytes, and other metadata from any file.
Pomodoro Timer
Stay focused with a Pomodoro timer — 25 min work sessions, customizable breaks, session counter.
HTTP Request Tester
Send HTTP requests directly from your browser and inspect the response headers and body.
Text Reverser
Reverse characters, words, or lines — plus flip text upside-down and check palindromes.
Countdown Timer
Count down from a custom duration or to a specific future date and time.
DNS Lookup
Query DNS records (A, AAAA, MX, CNAME, TXT, NS, SOA) for any domain via Google DNS-over-HTTPS.
IP Geolocation
Instantly look up the location, ISP, timezone, and ASN for any IP address — or detect your own.