Independent · third-party · sells nothing
Anyone can print a certificate.
Peptora reads the document you were given, checks what can actually be confirmed, and publishes a verdict with the reasoning attached. It will also tell you plainly what the certificate cannot establish.
Free, no account. No certificate handy? Read a finished one.
How it works
Upload the COA you were given — PDF or photo. No account needed for your first check.
Structural tamper forensics, cross-network reuse detection, and a molecular-identity gate run against the reference catalog.
A deterministic 0–100 score with a full audit log, on a permanent public permalink anyone can re-check.
Read the chromatogram, not just the headline.
A COA reports one purity number — but the truth is in the shape. A single tall target peak with a flat baseline is clean; secondary peaks or a noisy baseline mean the real purity is lower than the number claims. Mass spec then confirms that peak is the molecule it's supposed to be.
HOW TO READ A COA →90%
of the certificates we collected named no independent laboratory at all.
Not forged — self-issued. The seller testing its own product, printed in the visual language of third-party verification. One we read carried the vendor's own name as both the laboratory and the client. Nothing on the page tells a buyer which kind they are holding.
Only 42% carried an identifier you could quote back to a lab to confirm the report was ever issued.
- Files collected from COA pages
- 1,733
- From vendors
- 14
- Readable as certificates, so analysed
- 325
- Named no third-party lab
- 294
- Surveyed
- August 2026
Every file came from a vendor's own public COA page, with its source URL recorded. Those pages also carry product photos, so the percentage is taken only over documents that were readable as certificates — never over the wider haul. We publish the method because a number you cannot reproduce is worth nothing — how we score.
99% pure isn't the same as safe.
A high HPLC purity number describes one measurement of one impurity class. It says nothing about heavy metals, endotoxins, or residual solvents — the things a certificate usually leaves unmeasured. Peptora shows you what was tested, and flags what wasn't.
Received a certificate? Check it before you trust it.
The first check is free, no account required. Every verdict is public, permanent, and reproducible from its audit log.
CHECK A COA — FREE