Useful conversions. Less friction.

XXF Tools is a focused collection of browser-based utilities for the small transformations that interrupt frontend work: formatting JSON, generating types, translating data formats, decoding text and preparing markup.

Private by design

The tools run on your device. Your source data is not uploaded to an XXF conversion API, stored in an account or reviewed by us. This architecture makes the toolbox practical for internal payloads and work-in-progress code, while keeping the experience fast.

Built for understandable output

Every tool keeps the original input visible, explains errors in plain language and provides copy and download actions. Generated types and schemas are intentionally readable so you can review them before production use.

Independent and free

XXF is free to use without registration. The site may display advertising to support hosting and ongoing maintenance, but tool access is not gated behind an account.