Document check
Verify a Sojourn Logbook document
Free, no account — and the file never leaves your device. Everything below runs in your own browser.
Drop the PDF here
…or choose it from your device.
PDF only. Nothing is uploaded — open your browser’s network tab and watch: dropping a file makes no request at all.
- Checksum in the document
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- Hash of this file
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Covers the record the document was built from. Change one entry, export again, and this number is different.
The fingerprint of the file in front of you. A different thing: it changes if a single byte of the PDF changes, including a re-print of the same record.
This check confirms the file is intact and came from Sojourn Logbook™. It does not confirm the entries inside are true — those are the holder’s own declaration.
How this works
Every document Sojourn Logbook exports carries a checksum of the record it was built from, printed in the footer next to this page’s address. A checksum is a number computed from the content: change one flight, one date, one signature, and re-export, and the number comes out different.
This page reads the PDF you give it, finds that footer, and shows you what the document claims about itself — alongside the hash of the actual file. No account, no upload, no record kept. Once the page has loaded you can disconnect from the network entirely and it still works.
What it cannot do is vouch for the flying. A logbook is a declaration by the person who keeps it; this confirms the paperwork is the paperwork Sojourn produced, and nothing more.