Tiny tools for browser emergencies.
177 free utilities, no signup, most running entirely in your browser.
Now also as an HTTP API and MCP server for scripts and AI agents.
Most popular
View all →Base64 Encoder / Decoder
Encode or decode Base64 strings instantly.
Color Picker & Contrast Checker
Pick colors, convert between HEX/RGB/HSL, and check WCAG contrast.
Hash Generator
Compute SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or a file.
Image Compressor
Shrink JPG, PNG, and WEBP images in your browser — pick the quality and see the savings.
JSON Formatter & Validator
Pretty-print, minify, and validate JSON.
JWT Decoder
Decode and inspect a JSON Web Token's header, payload, and expiry.
Lorem Ipsum Generator
Generate placeholder text by words, sentences, or paragraphs.
Mortgage Calculator
Estimate your monthly PITI — principal, interest, property tax, insurance, and PMI.
Password Generator
Strong, customizable passwords generated with crypto-secure randomness.
Percentage & Ratio Tool
Six modes of percent: X% of Y, what % is X of Y, % change, markup, margin, and ratio simplifier.
QR Code Generator
Generate a QR code from any text or URL. Download as PNG.
Regex Tester
Test JavaScript regular expressions with live match highlighting and capture groups.
Smart Calculator
A calculator that understands expressions, percentages, and unit conversions like '12ft to cm' or '15% of 240'.
Timestamp Converter
Convert between Unix timestamps, ISO dates, and local time.
Word & Character Counter
Count characters, words, sentences, paragraphs, and reading time.
Try a workflow
All workflows →Chains of tools you can run with one click. Paste input, get output. Edit any step.
Decode a JWT and pretty-print the result.
URL & TokensParse CSV with a header row and pretty-print as JSON.
JSON / CSV / YAMLTrim, drop blanks, lowercase, deduplicate, and sort a list of email addresses. Lowercasing first means Alice@… and alice@… dedupe correctly.
TextPretty-print messy SQL.
SQLBuild a Tailwind-style 50–950 palette from a base hex color.
CSS & ColorRender Markdown to HTML and pretty-print it.
HTML & Markdown