PDF Audit Trail & Digital Verification Certificate Generator

Create legal-grade digital certificates of completion with SHA-256 cryptographic hashes and verification QR codes.

Hufanya kazi kwenye kivinjari chako. Faili zako hazitoki kamwe kwenye kifaa. Tazama jinsi ya kuthibitisha

…

Jinsi ya kufanya

1
Chagua mipangilio yako
Jaza maelezo au chagua chaguo unazohitaji.
2
Angalia matokeo
Onyesho la awali husasishwa mara moja unapobadilisha kitu.
3
Pakua au hifadhi
Hifadhi matokeo kwenye kifaa chako. Hakuna kinachotumwa wala kuhifadhiwa kwenye seva.

Kuhusu zana hii

Generate an official Audit Trail and Digital Verification Certificate for any PDF contract or signed document. Computes client-side SHA-256 and SHA-512 cryptographic digests to prove the document has not been altered, records signer identities, timestamps, and verification methods compliant with ESIGN and eIDAS standards. Download as a standalone A4 certificate PDF, append it as the final verified page of your document, or export the audit log in JSON.

Vidokezo vya matokeo bora

Kabla ya kuanza, tumia muda kidogo kusoma chaguo na ujaribu zana kwa mfano mdogo kwanza. Kila kitu hufanya kazi kwenye kivinjari kwenye kifaa chako mwenyewe; hakuna unachoandika au kuongeza kinachopakiwa na kufunga kichupo hufuta kila kitu. Ikiwa kitu hakionekani sawa, pakia upya ukurasa na ujaribu tena au tumia kiungo cha kuripoti kwenye ukurasa huu kutuambia kilichoharibika. Ikiwa matokeo bado yanaonekana vibaya, badilisha thamani moja kwa wakati ili uone kisanduku gani kinaathiri zaidi. Weka alama ya ukurasa huu ikiwa utaitumia tena.

Kwa ufupi

Kategoria: Hariri na saini
Hufanya kazi kwenye kivinjari, bila usajili, bila kupakia.
Taarifa unazoingiza hubaki kwenye kifaa chako.
Inapatikana kwa lugha nyingi.
Maudhui yalikaguliwa mwisho: 15 October 2026

Maswali yanayoulizwa mara kwa mara

What is a document audit trail certificate?

It is a legal record that records the cryptographic fingerprint (SHA-256 hash), signing timestamp, and signer identities of a document, proving it has not been modified after signing.

Are my contracts or confidential files sent to a server?

No. The entire cryptographic checksum calculation and PDF certificate rendering occur locally in your browser using the Web Crypto API. Your documents remain strictly confidential.

Can I append the certificate to my signed PDF?

Yes. With one click, the tool merges the official Certificate of Completion as the final page of your PDF agreement.

Does this comply with ESIGN and eIDAS standards?

Yes. The cryptographic hash and timestamped signer record meet the technical requirements for tamper-evident digital audit logs.

Hariri PDFHariri maandishi ya PDF, futa, ongeza maandishi, maumbo, picha na sahihi, yote kwenye kivinjari chako.

Saini PDFChora, andika au pakia sahihi, ihifadhi kwa mara nyingine na iweke kwenye ukurasa wowote, pamoja na tarehe, na kwenye kila ukurasa ukihitaji.

Ongeza nambari za kurasa kwenye PDFWeka nambari za kurasa kwa umbizo lako, nafasi, nambari ya kuanzia na tarakimu za Kibengali, kwa onyesho la moja kwa moja.

Ongeza alama ya maji kwenye PDFBandika alama ya maji ya maandishi kwa ukubwa, rangi, pembe na uwazi kwenye kurasa zote au baadhi, kwa onyesho la moja kwa moja.

Sawazisha PDFFunga sehemu za fomu zilizojazwa na maelezo ili zisiweze kubadilishwa tena.

Geuza mpangilio wa kurasa za PDFWeka kurasa za PDF kwa mpangilio wa kinyume.

PDF yenye kurasa nyingi kwa karatasiWeka kurasa 2, 4, 6 au 9 za PDF kwenye karatasi moja ili kuokoa karatasi.

Badilisha ukubwa wa ukurasa wa PDFBadilisha PDF kuwa A4, US Letter, Legal, A5 au A3.