Kaizu Dev
Small tools for everyday code.
Format JSON, encode Base64, read a JWT, make UUIDs and passwords, and hash text or files. Free, no sign-up, and nothing you paste leaves your browser.
JSON formatter
Pretty-print, minify and check JSON, with the exact line of any error.
Open →Base64 encode & decode
Turn text into Base64 and back, URL-safe too, or a file into a data URL.
Open →JWT decoder
Read a token’s header and claims, and see when it was issued and when it expires.
Open →UUID generator
Random v4 or time-ordered v7 UUIDs, one or a thousand, and read any UUID.
Open →Password generator
Strong random passwords made with your browser’s secure random numbers.
Open →Hash generator
MD5, SHA-1, SHA-256 and SHA-512 of text or a file, to check downloads.
Open →