What does Repair PDF do?

It takes a damaged or corrupted PDF, parses it with error-tolerant settings, and saves a clean copy with a rebuilt internal structure. Pages that survived the corruption are recovered.

Is my PDF uploaded to a server?

No. Repair runs entirely in your browser. Your file never leaves your device.

Can it fix every corrupted PDF?

Not always. If the file is severely truncated or the page content itself is destroyed, repair can’t recreate missing data. But for structural issues — broken cross-references, malformed headers — it works well.

Will the repaired file look the same?

If the page content is intact, yes. The tool doesn’t alter or re-render pages. It rebuilds the PDF wrapper around the existing content.

Why does my repaired file have a different size?

The tool rebuilds the document structure from scratch. Redundant or damaged objects get dropped, and the cross-reference table is regenerated. This can make the file slightly smaller or larger.

Does it work with password-protected PDFs?

Yes. Enter the password to decrypt, then repair. Everything runs locally.

ซ่อมแซม PDF

กู้คืนและแก้ไขไฟล์ PDF ที่เสียหายหรือไม่สมบูรณ์

1. Select PDF

Select a corrupted or damaged PDF file from your device.

2. Repair document

The file is re-parsed and rebuilt, fixing structural issues automatically.

3. Download

Get your repaired PDF with a summary of what was fixed.

About Repair PDF

How PDF Repair Works

A damaged PDF usually has a corrupted internal structure — broken cross-reference tables, malformed objects, or truncated streams. OxygenPDF loads the file with lenient parsing, recovers what it can, and saves a clean, well-formed PDF.

The tool uses pdf-lib’s error-tolerant parser, which skips invalid objects instead of crashing. It rebuilds the document structure from scratch, producing a file that conforms to the PDF specification and opens reliably in standard readers.

When You Need to Repair a PDF

PDF corruption happens more often than you’d expect, and the cause is usually mundane.

Download Interruptions

A flaky connection cuts out mid-download. The file is incomplete and won’t open. Repair recovers the intact pages.

Software Export Bugs

Some apps produce PDFs with subtle structural issues. The file opens in one reader but crashes in another. Repair normalizes the structure.

Storage Corruption

Disk errors, bad sectors, or failed transfers can damage individual bytes. If the content is intact, repair can rebuild the wrapper.

Email Attachment Damage

Email servers occasionally mangle attachments. If the PDF arrives damaged, repair may recover the readable content.

How It Compares

PDF repair tools all use some form of lenient parsing. The real variable is whether they upload your potentially sensitive damaged file.

ฟีเจอร์	Adobe Acrobat	iLovePDF
Lenient/tolerant parsing
Rebuilds document structure
Shows file size before/after
No file upload required	Desktop only
Free to use		Limited

Repair Happens Locally

A corrupted file might still contain readable pages of sensitive content. Uploading it to a third-party repair service means sharing that content with a server you don’t control.

OxygenPDF repairs the file in your browser. The document stays on your device, damaged or not. The repaired output is generated locally and downloads straight to your machine.