Signed PDF certificate
Lists the captured email's visible content, the certificate ID, hashes, and the Ed25519 signature.
Use case · Email certification
Create certified proof of a sent or received email
When the other party denies receiving your email, an independently timestamped certificate is the simplest answer. Capture the message in webmail or upload the source .eml file — either way, the result is a signed PDF that proves content and time.
RFC 3161Qualified timestamp
SHA-256Content hash
PDF + ZIPCourt-ready package
Why a screenshot is not enough.
Email screenshots are the most-disputed form of digital evidence. The reasons are well known to opposing counsel.
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Full headers are hiddenDKIM signatures, SMTP trace, and Message-ID are not in the inbox view.
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Screenshots can be made in any word processorA picture of an email is trivially fabricated. Courts know this.
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The "Date" line is editableYour computer clock is not authoritative. A qualified timestamp authority is.
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Forwarded emails lose original headersForwarding strips the original DKIM signature and Message-ID.
What a certified email package contains.
Webmail capture
Full-page screenshot of the email as it appeared in Gmail, Outlook Web, or another provider.
Source file (optional)
If captured as a File certificate, the original .eml is bundled — full headers preserved.
Network log
For browser captures, proves which provider served the message.
RFC 3161 timestamp
Independent third-party signature on the captured content.
Metadata ZIP
Manifest, signature, public key, and timestamp request/response.
How to certify an email.
Choose the method that matches what you have access to. Both produce a court-ready record.
1
If you have webmail accessOpen the email, enable "Show original" or full headers, and certify the page via a Browser Session.
2
If you have only a saved .eml fileGo to /certificates/new and select File. Upload the .eml — its SHA-256 hash and timestamp are bound together.
3
If you have only a forwarded copyCertify the forwarded message; note in your file that headers were stripped by the forwarding step.
4
Download and shareThe PDF goes to your lawyer; the ZIP allows the other side to verify independently.
How to capture different email scenarios.
Email visible in webmail
Browser Session, with "Show original" enabled if you need the technical headers.
Saved .eml or .msg file
File certificate. SHA-256 hash binds the saved file to the timestamp.
WhatsApp confirmation thread
If the other party acknowledged the email by message, certify the chat too.
Email-evidence questions, answered directly.
How do I prove an email was sent at a specific time?
Open the email in webmail and certify the page with a Website or Browser Session certificate. The capture records the email content, the visible headers, and binds them to a qualified RFC 3161 timestamp independent of your computer clock.
Can a screenshot of an email be used as evidence?
Screenshots are admissible but routinely challenged because they can be edited in any word processor. A certified capture of the email — with headers, URL, and a third-party timestamp — is far harder to dispute.
How do I prove an email was not altered?
Save the original message as a .eml file and certify it as a File. The certificate hashes the file with SHA-256 and binds the hash to a qualified timestamp. Any later modification to the .eml breaks the hash.
Can I certify an email I already deleted?
Only if you can still retrieve it (Trash folder, IT backup, or recipient's copy). Once permanently deleted from all sources, there is nothing to capture.
Is this legal advice?
No. This service creates technical evidence artifacts. Legal admissibility depends on jurisdiction and circumstances. Consult qualified legal counsel for advice specific to your situation.
Ready to certify?
Whether you are sending a legal notice or proving receipt, certified email evidence resolves disputes faster.