Developer tools

Search and open free browser-based utilities for everyday engineering tasks.

JSON Formatter & Validator

Beautify, minify, and validate JSON instantly in your browser.

Open tool →

Generator Tools

Popular

Lorem Ipsum Generator

Generate placeholder paragraphs, sentences, or words for mockups.

Open tool →

Encoding Tools

Popular

URL Encoder / Decoder

Encode and decode URL components with real-time conversion.

Open tool →

Encoding Tools

New

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to plain text.

Open tool →

Crypto & Security Tools

Popular

UUID Generator

Generate RFC-compliant UUID v4 identifiers for apps and databases.

Open tool →

Crypto & Security Tools

New

Hash Generator

Generate MD5, SHA-1, and SHA-256 hashes from any text input.

Word Counter

Count words, characters, sentences, paragraphs, and reading time instantly.

Case Converter

Convert text to UPPER, lower, Title Case, camelCase, snake_case, and more.

Open tool →

Text Tools

New

Text Reverser

Reverse characters, word order, or line order in any text.

Text to Slug Converter

Convert any title or phrase into a clean, URL-friendly slug.

Open tool →

Text Tools

New

Duplicate Line Remover

Remove duplicate lines from text while keeping first occurrences.

Open tool →

Text Tools

New

Line Sorter

Sort lines alphabetically, numerically, or by length.

Open tool →

Text Tools

New

Whitespace Remover

Trim lines, collapse spaces, and remove blank lines from text.

Text Diff Checker

Compare two texts line by line and highlight additions and removals.

Find & Replace Tool

Bulk find and replace text with optional regex and case sensitivity.

JSON to CSV Converter

Convert a JSON array of objects into downloadable CSV.

CSV to JSON Converter

Convert CSV with headers into a JSON array of objects.

JSON to TypeScript Interface

Generate TypeScript interfaces from JSON samples.

Open tool →

Text Tools

New

Remove HTML Tags

Strip HTML tags and decode common entities to plain text.

Open tool →

Crypto & Security Tools

Popular

New

JWT Decoder

Decode JWT header and payload locally without verifying the signature.

URL Parser

Break a URL into protocol, host, path, query, hash, and more.

Query String Parser

Parse URL query parameters into JSON, including repeated keys.

SQL Formatter

Beautify SQL queries with keyword casing and readable line breaks.

Regex Tester

Test regular expressions with live match lists and capture groups.

Open tool →

Validator Tools

New

Email Validator

Validate email address format with a practical regex check.

HEX to RGB Converter

Convert colors between HEX and RGB with a live preview swatch.

Color Picker

Pick a color visually and copy its HEX value instantly.

Color Contrast Checker

Check WCAG contrast ratios between foreground and background colors.

CSS Box Shadow Generator

Build CSS box-shadow values with live preview controls.

CSS Gradient Generator

Create linear-gradient CSS from two colors and a direction.

Markdown Preview & HTML Converter

Write Markdown with live preview and copy the generated HTML.

QR Code Generator

Generate a QR code from any text or URL and download it as PNG.

My IP Address Tool

Show your public IP address with one-click copy and refresh.

CSS Flexbox Generator

Visually tune Flexbox properties and copy the CSS.

CSS Grid Generator

Build a simple CSS Grid with columns, rows, and gap.

CSS Beautifier & Minifier

Beautify or minify CSS in your browser.

Timestamp Converter

Convert Unix timestamps to dates and back, with ISO and UTC views.

HTML Formatter

Beautify or minify HTML markup in your browser.

Cron Expression Generator & Parser

Build 5-field cron expressions and read a plain-English explanation.

Open tool →

Generator Tools

New

.gitignore Generator

Generate a starter.gitignore for popular stacks.

Image Compressor, Resizer & Converter

Compress, resize, and convert images to JPEG, PNG, or WebP in your browser.

Timezone Converter

Convert a date and time between common world timezones.

Open tool →

Crypto & Security Tools

Popular

New

Password Generator

Generate strong random passwords with length and charset controls.

Open tool →

Crypto & Security Tools

Popular

New

Password Strength Checker

Estimate password strength and entropy with a quick checklist.

Number Base Converter

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

Open tool →

Generator Tools

New

Random Number Generator

Generate random integers in a range, with optional uniqueness.

Code Diff Viewer

Side-by-side line diff for code snippets and config files.

Open tool →

Code Tools

New

Code Minifier (JS/CSS)

Minify JavaScript or CSS by stripping comments and extra whitespace.

Code Formatter

Format JavaScript, JSON, CSS, and HTML with a lightweight Prettier-like tool.

JSON / API Response Viewer

Fetch or paste API JSON and inspect a pretty-printed response.

HTTP Request Tester

Send simple HTTP requests from your browser and inspect the response.

Responsive Design Tester

Preview a website at common device widths inside an iframe.

JSON ↔ XML Converter

Convert between JSON and XML in either direction.

JSON ↔ YAML Converter

Convert JSON to YAML, YAML to JSON, and format YAML documents.

JSON Diff Checker

Compare two JSON documents and list added, removed, and changed paths.

Open tool →

Encoding Tools

New

HTML Entity, Hex & Binary Encoder

Encode and decode HTML entities, hexadecimal, and binary text.

Query String & UTM Builder

Build query strings and full UTM campaign URLs from key/value pairs.

Meta Tag Generator

Generate SEO and social meta tags for title, description, and Open Graph.

JSON Schema Validator

Validate a JSON document against a JSON Schema with common Draft-like rules.

CSV ↔ Excel Converter

Convert CSV to XLSX downloads and Excel uploads back to CSV.

Open tool →

Code Tools

New

HTML to Markdown Converter

Convert common HTML markup into Markdown text.

Open tool →

Crypto & Security Tools

Popular

New

JWT Encoder / Generator

Generate HS256-signed JWT tokens from header, payload, and secret.

Open tool →

HTTP & API Tools

New

HTTP Status Code Lookup

Look up common HTTP status codes and their meanings.

Open tool →

HTTP & API Tools

New

User-Agent Parser

Parse a User-Agent string into browser, OS, and device hints.

HTTP Headers Checker

Inspect CORS-visible HTTP response headers for a URL.

Open tool →

Regex Tools

New

Regex Cheat Sheet

Quick reference for common regular expression tokens.

Open tool →

Validator Tools

New

Phone Number Validator

Validate phone number formatting and extract digits.

HSL Converter & Color Palette

Convert HEX ↔ HSL and generate a simple hue-shifted palette.

Open tool →

CSS Tools

New

CSS Border Radius Generator

Visually tune corner radii and copy border-radius CSS.

Open tool →

CSS Tools

New

CSS Units Converter

Convert px values to rem, em, and % based on a root font size.

Open tool →

CSS Tools

New

CSS Animation Generator

Generate a simple CSS keyframe animation with live preview.

Favicon Generator

Generate favicon PNGs in multiple sizes from an uploaded image.

Open tool →

Regex Tools

New

Regex to Human-readable

Explain regular expression tokens in plain language.

Image Color Palette Extractor

Extract dominant colors from an uploaded image.

IP Address Lookup

Look up geolocation and org info for an IP address.

Image ↔ Base64 Converter

Convert images to Base64 data URLs and preview Base64 as images.

SVG Tools

Minify SVG markup and export SVG to PNG in the browser.

DNS Lookup Tool

Query DNS records (A, AAAA, MX, TXT, and more) via DNS-over-HTTPS.

QR Code Reader

Decode QR codes from an uploaded image in your browser.

Open tool →

Date & Time Tools

New

Date Difference Calculator

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

Open tool →

Date & Time Tools

New

ISO 8601 Date Formatter

Parse and format dates as ISO 8601 strings.

Open tool →

Image Tools

New

Placeholder Image Generator

Generate simple placeholder images with custom size and colors.

Open tool →

Generator Tools

New

License Generator

Generate common open-source license texts (MIT, Apache, GPL, and more).

Open tool →

Generator Tools

New

README Generator

Build a starter README.md from project fields and sections.

Open tool →

Image Tools

New

Image Cropper

Crop an image to a custom rectangle and download the result.

Open tool →

Math Tools

New

Percentage Calculator

Calculate percentages, percent-of values, and percentage change.

Unit Converter

Convert length, mass, temperature, and data-size units.

Open tool →

Crypto & Security Tools

Popular

New

Random Token Generator

Generate cryptographically random hex, Base64URL, or UUID tokens.

Open tool →

Crypto & Security Tools

New

AES Encrypt / Decrypt

Encrypt and decrypt text with AES using a passphrase (CryptoJS).

Open tool →

Crypto & Security Tools

Popular

New

Bcrypt Hash Generator

Generate and verify bcrypt password hashes in the browser.

IP Network Tools

IPv4 subnet calculator and CIDR to IP range converter.

Fake Data Generator

Generate sample people, emails, UUIDs, and company JSON for testing.

cURL to Code Converter

Convert cURL commands into fetch, Axios, or Python requests code.

Open tool →

HTTP & API Tools

New

Meta Tags Previewer

Preview Google-style snippets and social cards while editing meta tags.

Open tool →

HTTP & API Tools

New

API Response Mocker

Build local mock HTTP JSON responses with status codes and delay.

Open tool →

Code Tools

New

HTML Minifier

Minify HTML by removing comments and unnecessary whitespace.

Open tool →

Image Tools

New

EXIF Data Viewer

Inspect EXIF and image metadata from photos in your browser.

Image to PDF Converter

Combine one or more images into a downloadable PDF.

Open tool →

Code Tools

New

Syntax Highlighter

Highlight source code for common languages with highlight.js.

Code to Image Converter

Render a code snippet as a shareable PNG image.

Open tool →

Regex Tools

New

Regex Debugger

Step through regex matches with a per-character position map.

Open tool →

Validator Tools

New

Accessibility Checker

Run basic HTML accessibility heuristics (alt, labels, headings, lang).

URL Shortener

Shorten a long URL via a public shortener API (with local fallback).

WHOIS Lookup

Look up domain registration data via public RDAP.

SSL Certificate Checker

Inspect public Certificate Transparency records for a hostname.

Open tool →

Validator Tools

New

Lighthouse-lite Performance Checker

Heuristic HTML performance/SEO checks inspired by Lighthouse categories.

Open tool →

HTTP & API Tools

New

Webhook Tester

Send test webhook HTTP requests and inspect responses.

Open tool →

Text Tools

New

Text Utilities Toolkit

Length, truncate, palindrome, ASCII art, repeat, shuffle, and wrap tools.

Open tool →

Encoding Tools

New

Encoding Extras Toolkit

Base32, ASCII/hex, Unicode escapes, Punycode, ROT13, and Morse code.

Open tool →

Math Tools

New

Math Utilities Toolkit

Primes, GCD/LCM, Roman numerals, number-to-words, ratios, and stats.

Open tool →

Generator Tools

New

Random Generators Toolkit

Random names, colors, quotes, dice, pickers, usernames, and Picsum links.

Open tool →

Generator Tools

New

Config Generators Toolkit

robots.txt, sitemap,.env, package.json, Docker, Nginx, Actions, commits.

Open tool →

Validator Tools

New

Data & Validation Toolkit

Credit cards, IBAN, JSON path, SQL minify, TOML, and markdown tables.

Open tool →

Date & Time Tools

New

Date & Time Extras

Age calculator, countdown, business days, and world clock.

Open tool →

Crypto & Security Tools

New

Crypto Extras Toolkit

HMAC, checksums, file SHA-256, and RSA key pair generation.

Open tool →

Network Tools

New

Network Extras Toolkit

Port lookup, redirect checks, link checks, and HTTP latency.

Open tool →

Design Tools

New

Design Extras Toolkit

Closest color names, CSS clip-path playground, and favicon size preview.

Open tool →

Image Tools

New

Image Extras Toolkit

PNG-to-SVG wrapper export and simple image watermarking.

Open tool →

Code Tools

New

Code Extras Toolkit

Simple JS obfuscation, regex-from-examples, and regex-to-code snippets.

Open tool →

Browser Tools

New

Browser Info Toolkit

Device detector, screen resolution details, and console log mirror.

Open tool →

Image Tools

New

Barcode Generator

Generate Code 39 barcodes as PNG images in the browser.

Open tool →

JSON Tools

New

JSON Validator

Validate JSON syntax instantly and see clear parse errors.

Open tool →

JSON Tools

New

JSON Minifier

Minify JSON by removing whitespace for compact payloads.

Open tool →

JSON Tools

New

JSON Beautifier

Pretty-print JSON with indentation for readable debugging.

Open tool →

JSON Tools

New

JSON Path Tester

Test simple JSONPath-style queries against JSON documents.

Open tool →

JSON Tools

New

JSON Schema Generator

Generate a draft JSON Schema from a sample JSON object.

Open tool →

Code Tools

New

XML Formatter

Beautify and indent XML for readable structure.

Open tool →

Code Tools

New

XML Validator

Check whether XML is well-formed in your browser.

Open tool →

Code Tools

New

XML Viewer

View and explore XML documents with formatted output.

Open tool →

Code Tools

New

XML Minifier

Compress XML by removing unnecessary whitespace.

Open tool →

Code Tools

New

XPath Tester

Evaluate XPath expressions against XML documents.

Open tool →

Code Tools

New

XML Compare

Compare two XML snippets and highlight differences.

Open tool →

Code Tools

New

YAML Formatter

Format and normalize YAML documents in the browser.

Open tool →

Code Tools

New

YAML Validator

Validate YAML syntax and surface parse errors clearly.

Open tool →

Code Tools

New

YAML Viewer

Parse YAML and view it as formatted YAML or JSON.

Open tool →

Code Tools

New

YAML Diff

Compare two YAML documents side by side.

Open tool →

Converter Tools

New

CSV Formatter

Normalize and pretty-align CSV rows for readability.

Open tool →

Converter Tools

New

CSV Validator

Check CSV structure, column counts, and empty rows.

Open tool →

Converter Tools

New

CSV Viewer

Preview CSV data in a simple table layout.

Open tool →

Converter Tools

New

CSV Splitter

Split a CSV into multiple chunks by row count.

Open tool →

Converter Tools

New

CSV Merger

Merge multiple CSV snippets into one file.

Open tool →

Converter Tools

New

CSV Cleaner

Trim cells, drop empty rows, and clean CSV noise.

Open tool →

Code Tools

New

SQL Validator

Basic SQL syntax checks for common query mistakes.

Open tool →

Code Tools

New

SQL Parser

Break SQL into clauses for quick inspection.

Open tool →

Code Tools

New

SQL Linter

Lint SQL for style and common anti-patterns.

Open tool →

Code Tools

New

SQL Query Builder

Build simple SELECT queries from form fields.

Open tool →

Text Tools

New

Character Counter

Count characters with and without spaces instantly.

Open tool →

Text Tools

New

Sentence Counter

Count sentences in any pasted text.

Open tool →

Text Tools

New

Remove Empty Lines

Strip blank lines from text in one click.

Open tool →

Text Tools

New

Shuffle Lines

Randomly shuffle lines of text.

Open tool →

Text Tools

New

Camel Case Converter

Convert text to camelCase for variables and keys.

Open tool →

Text Tools

New

Snake Case Converter

Convert text to snake_case for APIs and databases.

Open tool →

Text Tools

New

Pascal Case Converter

Convert text to PascalCase for types and components.

Open tool →

Text Tools

New

Kebab Case Converter

Convert text to kebab-case for URLs and CSS.

Open tool →

Text Tools

New

ROT13 Converter

Encode or decode text with the ROT13 cipher.

Open tool →

Text Tools

New

Morse Code Converter

Convert text to Morse code and back.

Open tool →

HTTP & API Tools

New

Robots.txt Generator

Generate a robots.txt file for crawl rules and sitemaps.

Open tool →

HTTP & API Tools

New

Sitemap Generator

Build an XML sitemap from a list of URLs or paths.

Open tool →

HTTP & API Tools

New

Open Graph Generator

Generate Open Graph meta tags for social sharing.

Open tool →

HTTP & API Tools

New

Twitter Card Generator

Generate Twitter Card meta tags for link previews.

Open tool →

HTTP & API Tools

New

Canonical Tag Generator

Create a canonical link tag for duplicate URL control.

Open tool →

HTTP & API Tools

New

JSON-LD Generator

Generate JSON-LD structured data script tags.

Open tool →

Generator Tools

New

Dockerfile Generator

Generate a starter Dockerfile for Node apps.

Open tool →

Generator Tools

New

Docker Compose Generator

Generate a docker-compose.yml starter for web apps.

Open tool →

Generator Tools

New

Kubernetes YAML Generator

Generate basic Kubernetes Deployment and Service YAML.

Open tool →

Generator Tools

New

Nginx Config Generator

Generate a reverse-proxy Nginx server block.

Open tool →

Crypto & Security Tools

New

RSA Key Generator

Generate RSA public/private key pairs in the browser.

Open tool →

Crypto & Security Tools

New

SHA256 Generator

Generate SHA-256 hashes from text instantly.

Open tool →

Crypto & Security Tools

New

SHA512 Generator

Generate SHA-512 hashes from text instantly.

Open tool →

Crypto & Security Tools

New

MD5 Generator

Generate MD5 hashes for checksums and quick digests.

Open tool →

Crypto & Security Tools

New

HMAC Generator

Generate HMAC-SHA256 signatures with a secret key.

Open tool →

Crypto & Security Tools

New

Nano ID Generator

Generate URL-safe Nano ID style unique identifiers.

Open tool →

Crypto & Security Tools

New

UUID v7 Generator

Generate time-ordered UUID v7 identifiers.

Open tool →