Hash in your browser
Your file never leaves your device. The SHA-256 hash is computed locally and that's all that gets sent.
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Photon
Your work, protected forever. Every file is hashed in your browser and anchored on Bitcoin.
Beta is open now. Free account, no credit card.
Why Photon?
Because "I made this first" shouldn’t require a lawyer.
Whether you’re a student submitting an assignment, a designer protecting a concept, or a developer shipping code — there are moments when you need to prove that your work existed, unchanged, at a specific point in time. Photon does that. One drag, one stamp, one permanent record on the oldest blockchain in existence.
How it works
Anchored on Bitcoin
The hash is stamped to the Bitcoin blockchain via OpenTimestamps — permanent, public, and tamper-proof.
Instant verification
Drop any file into Verify to confirm its hash matches the record on chain. No account needed.
Tag and search
Add #tags to your stamps so you can find your work years later. Your own searchable archive.
Any file type
Documents, code, images, audio — if it's a file, Photon can stamp it. Up to 20 MB per file.
Your data, full stop
No selling your file list. No mining your metadata. Your stamp history is yours.
Beta testers wanted