Secure parameters require secure utilities. Decode JSON Web Tokens (JWT), unescape percent-encoded URLs, translate Base64 binary text, or generate cryptographic checksums without exposing private strings or API keys to external log systems.
Encode text into Base64 for data URIs, HTTP auth headers, and binary-safe transport. Free and fully offline — everything runs in your browser, so tokens, keys, and payloads never touch a server.
Decode Base64 strings back into readable text instantly. Free, offline, and private — perfect for inspecting data URIs, auth headers, and encoded API payloads without pasting secrets into a random website.
Percent-encode URLs and query parameters so spaces, symbols, and non-Latin text survive transport intact. Free, offline, and browser-based — the safe way to build OAuth callbacks, search URLs, and API query strings.
Turn percent-encoded URLs back into readable text to inspect query parameters, redirect chains, and tracking links. Free, offline, and private — paste suspicious links safely; the tool never fetches or visits them.
Paste any JWT access token and instantly inspect its decoded header, payload claims, and signature segment — expiry timestamps, issuer, audience, and scopes laid out as readable JSON. Decoding happens entirely in your browser, so production tokens carrying real user data are never uploaded anywhere. Free, no signup, works offline.
Type any text and get its MD5, SHA-1, and SHA-256 digests computed side by side in real time — no page switching, no retyping. Built for comparing algorithms at a glance, matching whichever checksum format a download page publishes, and learning how digest length maps to each algorithm. Free, offline, your input never leaves the browser.
Compute MD5 checksums — 128-bit digests shown as 32-character hex — from any text instantly in your browser. The right tool when you need to match a published MD5 checksum, work with legacy systems, or generate deterministic identifiers like Gravatar hashes. Free and fully offline; never use MD5 for passwords or anything adversarial.
Generate SHA-1 digests — 160-bit hashes rendered as 40-character hex — from any text, instantly and offline. Indispensable when you're matching git commit hashes, verifying legacy checksums, or integrating with systems that still identify objects by SHA-1. Free, private, no upload.
Compute SHA-256 hashes — 256-bit digests as 64-character hex — from any text, instantly in your browser. The current standard for download verification, API request signing, certificate fingerprints, and blockchain addresses. Free, fully offline, nothing you type ever leaves your device.