How it works

Plain language · No jargon

The basics

You upload a PDF. TruePdf reads it, lets you make changes, then gives you a new file back. Nothing is saved on our end — the file exists only while you're working with it, then it's gone.

Every download comes with two fingerprints: one for the file you uploaded, one for the file you got back. These let you prove — to yourself or anyone else — that the file is exactly what TruePdf produced, unchanged.

Edit — Open the editor →

TruePdf works on any PDF — not just forms with clickable fields. Upload a bank-generated invoice, a SEPA payment slip, or any flat document and the editable text is detected automatically.

You type new values, and TruePdf replaces the text in place using the original font extracted from the file. The layout doesn't move. The typeface stays identical. The output is visually indistinguishable from the source — just with your changes applied.

For PDFs with fillable form fields, those fields stay interactive after editing. The file opens normally in Acrobat, Chrome, and Preview — nothing is flattened.

Redact — Open the redaction tool →

Redaction removes text from the file itself — not just draws a black box on top of it. A box can be moved or removed by anyone with the right tool. TruePdf deletes the underlying text so there's nothing left to uncover.

You pick what to remove: IBANs, email addresses, ID numbers, or any custom text. TruePdf highlights every match on the preview so you can confirm before anything is deleted. Once you apply the redactions, we verify the text is truly gone before sending the file back to you.

Proof receipts

Every file you download includes a unique fingerprint — a short string of letters and numbers that represents that exact file. If even one character in the file changes, the fingerprint changes completely.

You can use this fingerprint to prove to an auditor, a colleague, or a regulator that the file hasn't been modified since TruePdf produced it. Standard tools on any computer can verify it.