Crypto
Pick a tool. Most run fully in your browser.
Hash (MD5 / SHA)
MD5, SHA-1, SHA-256, SHA-512 for text or local files.
Base64
Encode and decode UTF-8 text or encode a local file.
URL Encode
Whole string, line-by-line, or query key=value batch.
HTML Entities
Encode and decode HTML entities like & and 😀.
Unicode / UTF-8
Inspect code points and UTF-8 bytes; escape and unescape \uXXXX.
UUID / GUID
Generate UUID v4, one or in a batch. Local only.
Password Generator
Random passwords in the browser, with a live strength meter.
JWT Decode
Inspect header and payload. Does not verify the signature.
HMAC
HMAC-SHA1 / SHA-256 / SHA-512 for text. Local only.
Password Strength
Score a password locally. Nothing is uploaded.
File Checksum
MD5, SHA-1, SHA-256, and SHA-512 of a local file in one pass.