Encoders & dev utilities

Small utilities you reach for several times a week: convert a cURL command into code, encode and decode Base64 and URLs, escape HTML, make a QR code, work in other number bases and calculate Unix permissions.

Where it is used: Used for the small jobs of everyday web work: decoding a mystery string, building a correct curl, setting HTTP headers, making a QR code.

Encoders & dev utilities on BackendBench: Paste-anything doctor (paste any snippet, we detect it and check it); AI-output verifier (trust report for what chatgpt or copilot gave you); Data size converter (kb, mib, bits and transfer time); Checksum calculator (crc32, crc32c, adler, fnv, hashcode); JWT builder & verifier (sign and verify hs256, rs256, es256); CORS config builder (spring, express and nginx cors); Set-Cookie builder (httponly, secure, samesite, prefixes); Cache-Control builder (max-age, no-cache, immutable); cURL command builder (a form to a correctly quoted curl); Smart decoder (peel base64, hex, url, gzip and jwt layers); cURL converter (curl to java, spring, python, go and javascript); Base64 encode / decode (unicode-safe, url-safe option); URL encode / decode (plus a url and query parser); HTML entities (escape and unescape html); QR code generator (download svg or png, no tracking); Number base converter (binary, octal, decimal, hex); chmod calculator (permissions as octal or rwx). Each one is free, needs no sign-up and runs entirely in your browser, so nothing you enter is uploaded.

Paste and check (2)HTTP and the web (6)Encode and decode (5)Handy utilities (4)