About Q36

Q36 is a collection of fast, private developer utilities that run entirely in your browser. There is no server processing your data, no account required, and no usage logging. Every tool on this site executes client-side using standard Web APIs — your input never leaves your device.

Why Another Dev Tools Site?

Most online developer tools are built as web services that send your data to a server for processing. That model introduces latency, privacy risk, and a hard dependency on the operator staying online. Q36 flips the model: the page is a thin shell that delivers JavaScript to your browser, and the browser does all the work. The result is tools that are faster than server-round-trip alternatives, work offline once loaded, and are safe to use with sensitive data like private keys, JWT secrets, database URLs, and API credentials.

What's Here

• JSON Formatter — Paste minified JSON and pretty-print it with syntax highlighting. Validates structure and shows parse errors inline.
• Base64 — Encode or decode any text or binary-as-text string. Handles standard and URL-safe alphabets.
• JWT Decoder — Paste a JSON Web Token to inspect its header, payload claims, and expiry without verifying the signature (and without sending it anywhere).
• UUID Generator — Generate cryptographically random v4 UUIDs in bulk. Uses crypto.randomUUID() when available, with a pure-JS fallback.
• Hash Generator — Compute MD5, SHA-1, SHA-256, and SHA-512 digests of any text input using the Web Crypto API.
• URL Encode/Decode — Percent-encode and decode URL components. Includes encodeURIComponent mode and handles the common plus-sign/space ambiguity in query strings.
• Unix Timestamp — Convert between Unix epoch timestamps (seconds or milliseconds) and human-readable UTC/local dates. Auto-detects seconds vs. milliseconds.
• Regex Tester — Live regular expression testing with match highlighting, group extraction, and flag controls. Uses the JavaScript RegExp engine.
• Color Converter — Convert between HEX, RGB, and HSL color formats with a live preview swatch.
• Text Diff — Compare two blocks of text line by line using an LCS algorithm. Shows added, removed, and context lines in a unified view.
• Markdown Preview — Live markdown to HTML preview covering headings, bold, italic, lists, code blocks, links, and blockquotes.
• Lorem Ipsum — Generate configurable blocks of placeholder text for wireframes and layout work.

Privacy

Q36 uses Google Analytics to understand aggregate traffic patterns (pages visited, approximate geography, device type) and Google AdSense to display ads. Neither service receives the content you type into any tool — all tool processing is client-side. See the Privacy Policy for details.