Free developer tools

Small, fast tools that run entirely in your browser — no signup, nothing sent anywhere. Build and decode the commands and values developers look up most.

Command line

Build the command, see every flag explained, or paste one to decode. Nothing is uploaded.

tarArchive: create, extract, list findSearch files by name, size, time rsyncSync & back up, safely curlHTTP requests with headers & auth sedFind-and-replace, delete, print awkExtract columns, filter, sum sshConnect, tunnel, run commands gitSearch a task → the git command

Scheduling

CronBuild & explain cron expressions

Permissions

chmodOctal ↔ symbolic permissions

Encode & convert

Encoders and converters that run in your browser.

SlugClean URL slugs from any text HexHex ↔ text, UTF-8 aware UnicodeText ↔ \uXXXX & entities HMACHMAC-SHA256/1/512 in-browser BaseBinary, octal, decimal, hex, any base