A PDF that got cut off mid-download, came out of a crashed export, or simply throws an error the moment you open it. Drop it in and it gets rebuilt from whatever is still readable. Nothing is re-compressed on the pages that come through intact.
Your file never touches our disk. This tool works entirely in memory and hands the result straight back in the same response — unlike the other tools on this site, there is no 45-minute copy sitting on our server afterwards, because none is ever written.
By ShinobiTools Team · Last updated: August 2026
Most PDF damage is structural, not content loss: a cross-reference table that got cut off, or an end-of-file marker that never arrived. This tool reconstructs that structure by scanning the file for its actual objects and re-indexing them, the same recovery approach every serious PDF library falls back on when the declared structure does not match what is actually in the file.
Everything starts from your browser tab with nothing installed, while the rebuild itself runs on our own server. You can fix PDF files one after another, and each pass takes a few seconds. It works as an online PDF repair tool in the plain sense: upload a PDF file and download the rebuilt copy in the same browser tab.
If part of the file's raw bytes are genuinely gone — not just the index pointing to them, but the content itself — no rebuild can bring back what was never written. A repair recovers structure, not missing data.
Whether the damage is a single truncated file or a batch of them, each one goes through the same rebuild from its actual objects.
This tool works entirely in memory and hands the result straight back in the same response — there is no copy sitting on our server afterwards, because none is ever written.
Repaired a file that is now much larger than it should be? Compress PDF shrinks it back down. Need it archive-safe afterwards? Convert PDF to PDF/A is the next step. Repaired file come back with its table of contents missing or pointing at the wrong pages? PDF Bookmarks rebuilds it from scratch.
A quick check before you upload: open the file in a text editor. If it starts with something other than %PDF, for example an HTML error page that was saved with a .pdf name, it is not a damaged PDF but a different file, and no corrupt PDF repair can turn it into one; download it again from the source.
Drop the file in. It is rebuilt automatically, there is nothing to configure, and the download starts as soon as it is done.
Files cut off mid-download or mid-transfer, a broken cross-reference table, and other structural damage that stops a PDF from opening cleanly. It rebuilds the file's internal structure from whatever content is still intact.
It scans the file for its actual content objects and rebuilds the cross-reference index and end-of-file structure from scratch. The page content itself is carried over untouched, so nothing loses quality.
No. If a page's content was never written to the file, or that part of the file is gone rather than just structurally broken, there is nothing left to rebuild from. It isn't file recovery for a deleted file either: it repairs a file you still have.
Usually not. It is a PDF fixer for files that fail to open or throw a structural error; if the file opens fine but one page renders incorrectly, that is a different kind of problem.
Yes. The output is a standard PDF that opens in Acrobat, browser PDF viewers, Preview and any other reader.
Yes, it is free, with no account, no watermark and no daily cap, so you can repair a corrupt PDF online free of charge as often as you need. Each file can have up to 25 pages and 250 MB; a €5 pass raises that to 200 pages and 500 MB.
One at a time: drop a file, download the rebuilt copy, then the next. There is no batch upload yet.
No. This repair PDF tool runs in the browser tab, and a repair PDF document job works the same on a phone or a laptop, because the rebuild runs on our own server. It is the same PDF tool whether the file won't open at all or throws an error partway through.
Usually the cause is a broken cross-reference table or a file cut off mid-transfer, and a repair here fixes that. If the file doesn't start with %PDF when you open it in a text editor, it is a different file saved with a .pdf name, and you need to download it again from the source.
It is processed in memory and handed straight back in the same response; no copy is ever written to our disk.
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