Document Validation

Validate a signed document.

Drop any electronically signed document — PDF, XML, or a CMS/JSON signature — to check it against every trust list Tindom carries. You get the full validation result and a Document Trust Grade, A+ to F. Free, no login required.

Drop a signed document here
or click to choose a file

Documents are validated on Tindom's own infrastructure and are never stored after validation is complete.

How it works

01 — Upload

Submit a signed document

Drop a signed document into the validator above — PAdES, XAdES, CAdES, or JAdES. It's processed transiently, never stored after validation is complete.

02 — Validate

Independent verification

Tindom checks the signature against every trust list it carries, using a self-hosted validation engine. No signing platform involved.

03 — Report

A grade, and the evidence behind it

The result is stated as a Document Trust Grade — one letter, A+ to F — on top of a structured Tindom Validation Attestation documenting the full validation result: independent evidence you can use in legal, compliance, and regulatory contexts.

Standards

Built on open standards

Tindom runs on the EU's reference implementation for electronic signature validation: eIDAS / ETSI TS 119 102-2. It checks five sources of trust — the EU trusted lists, third-country lists recognised under eIDAS, the Swiss and UK trusted lists, and the Adobe Approved Trust List. Trust list synchronization is automated. No platform dependencies. No black boxes.

The two below are the most-asked-about of the five. Every regime Tindom checks — what it is, who operates it, its legal weight, and the highest grade a document on it can reach — is set out in the rubric.

EU LOTL

European List of Trusted Lists

The authoritative source for Qualified Trust Service Providers across all EU member states. Updated continuously and synchronized automatically into Tindom's validation engine.

Learn more →
Adobe AATL

Adobe Approved Trust List

The global trust list for digital signatures recognized by Adobe Acrobat, covering certification authorities outside the EU regulatory framework.

Learn more →
Document Trust Grade

How a document is graded

Every grade Tindom issues comes from one published rubric, and nothing else — the full scale, what each rung requires, and which trust regimes we check against. Published so any grade can be checked against the rules that produced it.

Read the rubric →