About

A free barcode and QR code generator with a JSON API. It renders thirteen symbologies as PNG, SVG or PDF, validates check digits and fills in missing ones, reads codes back out of images, and turns a CSV, Excel or JSON file into a ZIP of codes. You don't need an account; registered users get API keys with defined quotas.

The studio, the API, accounts and the dashboard are one small Go binary built with gofastr, an open-source web framework. Pages render on the server and arrive already interactive: no frontend build step, no bundler. Sign-in, API keys, rate limiting and security headers came with the framework. If you build for the web in Go, it's worth a look.

The service is also usable by AI assistants directly: machine docs at /llms.txt, an OpenAPI schema, an agent card, and an MCP endpoint.