Tools
441 tools, 7 categories.
All tools
Developer Tools
JSON Formatter
Pretty-print raw JSON with configurable indentation.
JSON Validator
Validate JSON and get a clean parse result.
JSON Minifier
Compress JSON into a single-line payload.
JSON Diff
Compare two JSON documents and list what changed.
JWT Decoder
Decode JWT header and payload without verifying the signature.
Regex Tester
Run a regular expression against sample text and inspect matches.
SQL Formatter
Make messy SQL readable with keyword casing and line breaks.
Query String Parser
Parse search params into readable JSON.
Cron Expression Parser
Explain what a cron expression means in plain language.
HTTP Status Lookup
Look up the meaning of a response status code.
URL Parser
Break a URL into host, path, query, hash, and origin parts.
Encoding & Security
Base64 Encode / Decode
Encode plain text into Base64 or decode it back.
URL Encode / Decode
Encode or decode strings for safe query parameter usage.
Hash Generator
Create MD5, SHA-1, SHA-256, or SHA-512 hashes.
HMAC Generator
Sign content with a shared secret using common HMAC algorithms.
HTML Escape / Unescape
Escape raw HTML entities or decode them back into characters.
UUID Generator
Generate one or more RFC 4122 v4 UUIDs.
Password Generator
Generate random passwords with adjustable character sets.
Hex Encode / Decode
Encode UTF-8 text to hexadecimal or decode hex back to text.
Binary Encode / Decode
Encode text to binary bytes or decode binary to text.
Random String Generator
Generate random strings for tokens, IDs, and test fixtures.
Checksum Verifier
Generate a checksum and compare against expected value.
Text Tools
Word Counter
Count words, characters, lines, and reading time.
Case Converter
Convert text between lower, upper, title, camel, snake, and more.
Slug Generator
Turn titles into clean, SEO-friendly URL slugs.
Text Diff
Compare two versions of text line by line.
Duplicate Line Remover
Remove repeated lines while preserving the first occurrence.
Whitespace Cleaner
Trim spaces, collapse blank lines, or normalize messy text blocks.
Markdown to HTML
Convert common Markdown into HTML preview output.
CSV to JSON
Parse CSV rows into JSON objects.
JSON to CSV
Convert JSON arrays into CSV rows.
Meta Title Preview
Preview an SEO title with live character guidance.
Meta Description Preview
Preview description length and how it may appear in search results.
Design & Assets
Color Converter
Convert between HEX, RGB, and HSL color formats.
CSS Gradient Generator
Generate a linear gradient and copy the CSS instantly.
Favicon Generator
Create a simple SVG favicon from initials and brand colors.
SVG Optimizer
Strip comments and collapse whitespace in SVG markup.
CSS Minifier
Minify CSS by removing comments and extra whitespace.
CSS Formatter
Pretty-print CSS with readable indentation.
SVG to Data URI
Convert SVG markup into a CSS-ready data URI.
Color Palette Generator
Generate lighter and darker shades from a base color.
Contrast Checker
Calculate WCAG contrast ratio between two colors.
Box Shadow Generator
Generate CSS box-shadow values with custom offsets and blur.
Border Radius Generator
Generate border-radius CSS from corner values.
Calculators
Percentage Calculator
Solve common percentage questions from one compact form.
Age Calculator
Calculate age in years, months, and days.
Bytes Converter
Convert storage values across bytes, KB, MB, GB, and TB.
Loan Payment Calculator
Estimate monthly payment, interest, and total repayment.
BMI Calculator
Calculate body mass index and weight category.
BMR & TDEE Calculator
Estimate daily calories from age, body metrics, and activity.
Compound Interest Calculator
Calculate future value with recurring monthly contributions.
Discount Calculator
Calculate final price after discount and optional tax.
Tip Calculator
Split bill totals with tip across multiple people.
Date Difference Calculator
Calculate exact difference between two dates.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin.
AI Tools
AI Search Assistant
Use free AI + Wikipedia search to answer questions with sources.
AI Content Brief Generator
Generate a fast SEO content brief from a keyword using a free AI API.
AI Keyword Ideas
Generate long-tail keyword ideas with search-intent grouping.
Wikipedia Page Summary
Look up a Wikipedia summary in multiple languages.
Wikipedia Search Explorer
Search Wikipedia articles and inspect results quickly.
AI Text Summarizer
Summarize long text into concise bullet points.
AI Paraphraser
Rewrite text in a new tone while keeping the original meaning.
Prompt Starter Ideas
Generate AI prompt starter ideas.
Image Prompt Ideas
Generate image generation prompt ideas.
Media Tools
Openverse Image Search
Find free-licensed images from Openverse API.
Commons Video Search
Search free videos from Wikimedia Commons.
AI Image Generator
Generate images from prompts using a free public API.
Video oEmbed Inspector
Fetch metadata and preview for supported video URLs.
Text to Speech
Speak typed text in the browser with adjustable voice speed.
Openverse Audio Search
Find free-licensed music and audio tracks.
Commons Image Search
Search Wikimedia Commons image files.
NASA APOD Explorer
Browse NASA's Astronomy Picture of the Day.