Skip to content
Convertto

Repair a Damaged PDF — Rebuild the Structure

Rewrite a PDF's internal structure to recover a file that will not open properly.

A PDF that will not open is usually structurally broken rather than content-broken — a truncated cross-reference table or a bad object offset. Repairing rewrites the document structure from scratch and, page by page, keeps everything that can still be parsed while reporting exactly which pages were lost.

Runs in your browser
Privacy
Runs entirely in your browser — nothing is uploaded
Cost
Free, unlimited, no sign-up

Frequently asked questions

What kinds of damage can actually be repaired?

Structural damage — a broken cross-reference table, wrong object offsets, a missing trailer, a file that was appended to incorrectly. These are common and usually fully recoverable. What cannot be repaired is missing data: a download that stopped halfway has no page content to rebuild from.

Why does my repaired file have fewer pages?

Pages whose content stream is unreadable are skipped rather than producing a file that fails again on opening. The result tells you which page numbers were dropped, so you know exactly what is missing rather than discovering it later.

How to use the repair pdf

  1. 1Select your damaged pdf — the file stays on your device and is never uploaded.
  2. 2Turn "Rebuild page by page" on or off as needed.
  3. 3Press Run, then download the result when it is ready.

Embed this tool

Put the working repair pdf on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.

Share this tool

Related tools

Crop PDFTrim the margins of every page, or just the pages you choose, without re-rendering.Duplicate PDF PagesRepeat chosen pages any number of times — for labels, tickets, forms or handouts.Edit PDFAdd text, pictures, shapes, arrows, highlights and freehand drawing to any PDF page.Excel to PDFConvert an Excel workbook to a PDF table, one section per sheet, in your browser.Extract PDF PagesPull specific pages out of a PDF into a new document, in one file or one file per page.Fill PDF FormsRead a PDF's interactive form fields, fill them in, and optionally lock the answers.

Last updated

More pdf tools