Small utilities for developers, solo founders, and vibe coders. Nothing here tracks you or needs an account.
Paste a JWT, inspect the header and payload. Client-side — nothing leaves your browser.
OpenPaste JSON to validate and format it with consistent indentation. Errors shown inline.
OpenEncode text to Base64 or decode it back. Unicode-safe, runs entirely in your browser.
OpenGenerate cryptographically random v4 UUIDs. Copy individually or all at once.
OpenTest JavaScript regular expressions with live match highlighting and named capture group support.
OpenPaste two blocks of text and see exactly what changed — added and removed lines highlighted.
OpenPaste a cron expression, get a plain-English description and a breakdown of each field.
OpenFill in the campaign parameters, get a clean UTM-tagged URL ready to share.
OpenSee how any URL unfurls on X / Twitter, LinkedIn, and Slack before you post.
OpenGenerate the plain-text file that tells AI agents what your product does and where to find docs.
OpenAn interactive checklist for pre-launch, launch day, and immediately after — with progress tracking.
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