Developer toolbox
Useful tools. No round trip required.
Small utilities for everyday web development. The first-party tools process your input locally, and the external picks are selected for client-side processing too.
Built here
Quick utilities
Inputs are processed by browser APIs and JavaScript.
Vim navigation: h j k l moves between projects; Enter opens the focused one.
JSON Formatter
Format, validate, or minify JSON without sending it anywhere.
Open toolURL Encoder
Encode and decode URL components for query strings and routes.
Open toolBase64
Encode or decode UTF-8 text as Base64 entirely in the browser.
Open toolReact + Tailwind Layout Generator
Shape a responsive app shell visually and copy production-ready TSX.
Open toolCSS Gradient Builder
Design a linear gradient and copy it as CSS or a Tailwind arbitrary value.
Open toolJWT Inspector
Decode JWT headers and payloads locally without uploading sensitive tokens.
Open toolCSS clamp() Calculator
Generate fluid responsive sizes from min/max values and viewport bounds.
Open toolSecurity workbench
Inspect, harden, and verify
Sensitive inputs stay in this browser tab.
Secure Password Generator
Create strong passwords with cryptographically secure browser randomness.
Open toolHash Generator
Calculate SHA-256, SHA-384, or SHA-512 for text and local files.
Open toolHMAC Generator
Create keyed message signatures for webhook and API debugging.
Open toolSRI Generator
Generate Subresource Integrity values for scripts and stylesheets.
Open toolCSP Builder
Assemble a strict Content-Security-Policy header and test it safely.
Open toolSecurity Headers Analyzer
Review pasted HTTP response headers for browser hardening controls.
Open toolLocal Secret Scanner
Find recognizable credentials in source, logs, environment files, or diffs.
Open toolAround the web
Worth bookmarking
CyberChef
A browser-based toolbox for encoding, compression, hashing, parsing, and hundreds of other transformations.
Visit siteSquoosh
Compress, resize, and compare images locally using modern browser APIs and codecs.
Visit siteSVGOMG
A visual SVG optimizer powered by SVGO with processing performed in the browser.
Visit site