Why it matters
Validates RSS 2.0, Atom and JSON Feed: required fields, dates, GUIDs, enclosures and discovery tags.
XML parse with per-format rule sets; JSON Feed 1.1 schema; checks relative links, duplicate GUIDs, future dates, item count; renders a reader-style preview. Optional fetch of the feed URL and of the homepage to check link rel=alternate discovery. Everything runs in your browser; nothing you paste is sent unless you press Fetch.
How to use it
- Paste your input, or press Fetch to read a live URL you give.
- Read the results and the notes.
- Copy or download the output you need.
- If you used Fetch, check a sample on the live site too.
FAQ
Is my URL or page stored?
No. Fetch reads the address you give once, as LeejTools/1.0, and leej.uk keeps only a count. Pasted text never leaves your device.
Will this change my site for me?
No. It shows results and, where it writes rules or files, you copy them and apply them yourself.
Can I rely on this as official guidance?
It follows public documentation and well-known algorithms, and tells you where it is a subset or a simulation. Confirm critical changes in the official tool or a staging environment.
