Know what you have.
We look at the contents, not just the filename. An unfamiliar extension doesn’t have to be a dead end.
01 / LOOK BEFORE YOU OPEN
Unknown file.
Clear picture.
Find out what you have. See what’s inside.
No extra software. No file leaves this browser.
YOUR INSPECTION DESK
LOCAL PROCESSINGDrop an unfamiliar file here
One file at a time · up to 20 MiB · original stays unchanged
Or try something curious
Need a copy of these results?
Only if you want one. Create an unsigned report here, then choose whether to save it to your device. We receive no file, fingerprint, or report.
Make sense of it.
Tables become browseable rows. Archives reveal their contents. Unknown formats still have clues.
Keep it to yourself.
Nothing is uploaded or added to a file history. Clear the desk when you’re done.
THE AI FILE CHECK · PAID
Check a document before your AI reads it.
The File Room plugin looks through a document on your computer for hidden instructions, invisible text, secrets, personal data, disguised files and active content, before your assistant reads it. Your files never leave your machine. Only a check count does.
1,000CHECKS FREE EACH BILLING PERIOD
$1.99PER 1,000 CHECKS AFTER THAT
The first 1,000 checks per billing period are free, then $1.99 per 1,000. Usage only. Checkout asks for a card, and nothing is charged unless you pass 1,000 checks in a billing period. Identifying files on this desk stays free.
THE SAME DESK, IN YOUR TOOLS
Bring a little clarity to your AI.
Inspect unfamiliar files from Claude, Codex, Cursor, Grok Build and other local MCP clients. You choose what enters the conversation.
Use with your AI tools ↗ · Check files before your AI reads them ↗ · Build with the API ↗