Step 1: Upload your damaged file
Drag and drop it in, or upload it from your computer. There's nothing to configure first, since the tool identifies the type of damage automatically once the file is uploaded.
Drag and drop it in, or upload it from your computer. There's nothing to configure first, since the tool identifies the type of damage automatically once the file is uploaded.
That's the only action required. You don't need to describe what's wrong with the file or choose repair settings; the tool scans for common damage patterns and applies the right fix.
Once processing finishes, download the fixed PDF, either individually or together with other repaired files in a single zip.
The repair engine looks for common types of file damage, including corrupted data and internal or external file header errors, before repairing anything. This identifies exactly what's wrong with a file ahead of the fix rather than applying a generic repair blind.
Text, images, and fonts in damaged sections are recovered using detection tools that locate missing data and rebuild the original formatting, restoring the parts of a file that a basic repair would otherwise leave broken.
Upload multiple corrupted PDFs at once and recover them all together with the same quality applied to each. This is a real time-saver when dealing with a significant number of files, such as an archive of old documents or a batch of email attachments.
Repairs run on cloud servers rather than your device, so even complicated files process without taxing your computer's memory. Results are typically ready in seconds.
Files are end-to-end encrypted during upload and conversion, then deleted shortly after repair. Nothing uploaded is disclosed at any point in the process.
Repairs aim for a clean, clear representation of the original file, recovering detail without adding artifacts or distortions. The goal is a fixed PDF that reads exactly like the file was never damaged.
Works the same on any device or browser, including public or shared computers, and supports multiple PDF versions, so older files aren't left behind by a tool built only for the newest format.
Advanced scanning locates the exact source of corruption and applies a targeted fix rather than a blanket repair attempt, which improves success rates on harder cases like files damaged by an interrupted download or a virus scan.
The interface walks you through upload, diagnosis, and repair with minimal prompts, so fixing a file doesn't require understanding what actually went wrong with it first.
Scales from small, simple files to large PDFs with complex vector graphics or freeform annotations, without slowing down or failing partway through, thanks to the processing infrastructure behind the tool.
A corrupted proposal is a serious problem when a client or agency is waiting on it. Repairing the file rather than rebuilding it from scratch means you can edit and send it on time.
Scans with structural defects caused by a malfunctioning scanner can be corrected so pages display properly again, making it possible to extract images or text for archival or sharing without re-scanning the original.
Repair a corrupted research PDF received as an email attachment, rescuing citations and figures that would otherwise be lost.
Contracts damaged by storage errors can be repaired so language and signatures are recovered intact, without needing the signing process repeated.
Artists can fix portfolio PDFs corrupted during file transfer, restoring artwork and descriptions with the original quality preserved.
Accountants can recover damaged invoice or ledger PDFs, restoring numbers and graphs so financial monitoring and compliance records stay accurate.
Knowing why a PDF broke in the first place can help you avoid a repeat, even after this one's fixed.
Interrupted downloads or transfers are one of the most common causes.
If a download stops partway through, or a file transfer over a slow connection
cuts off early, the PDF ends up with missing or incomplete data, which is
exactly the kind of damage this tool is built to detect and recover.
Storage and hardware issues such as a failing hard drive, a corrupted
USB stick, or an interrupted cloud sync can damage a file that was previously
working fine, even without anyone editing it.
Software crashes during editing or saving can leave a PDF in a
half-written state if the program closes unexpectedly mid-save, resulting in
a file that looks complete in size but won't open correctly.
Email attachment handling by some mail servers can occasionally corrupt
attachments in transit, which is why a PDF that opened fine for the sender
sometimes arrives broken for the recipient.
None of these causes require starting over. In most cases, the original
content is still present in the file, just disorganized or partially unreadable,
which is what a repair tool is able to recover.
Not every PDF problem is corruption, and using the wrong tool wastes a step.
Repair PDF (this tool) fixes files with actual structural damage,
meaning the file's internal data is broken, missing, or malformed, often the
result of an interrupted download, a failed transfer, or storage corruption.
Symptoms include a PDF that won't open at all, opens with garbled content,
or triggers an error message.
Compress PDF solves a different problem: a file that opens fine but is
too large to email, upload, or load quickly. If a PDF opens without errors
but is simply unwieldy in size, Compress PDF is the right tool, not Repair.
Unlock PDF solves access problems rather than damage. If a file won't
open because it's asking for a password you don't have or have forgotten,
that's not corruption, and repairing it won't help. Unlock PDF is built for
that case instead.
A quick way to tell them apart: Garbled content or an error on open
points to Repair. A file that opens but is too big points to
Compress. A file that asks for a password you don't have points to
Unlock.
Severe corruption sometimes means a full repair can't recover everything. If that happens, a few fallback options can still save most of a document's content.
● If some pages open correctly and others don't, Extract PDF Pages lets you pull out and save the pages that did recover, rather than losing the whole file to a few bad pages.
● If the text is unreadable but the visuals came through, Extract PDF Images can recover photos, charts, or diagrams even when the surrounding document structure is still damaged.
● Once you've recovered content from multiple sources, whether that's a partially repaired file plus a backup copy,
Extract PDF Pages (this tool) pulls out the specific pages you choose and saves them as a new file, leaving the original PDF untouched. Use this when you want a subset of pages without altering the source document.
Split PDF divides an entire document into multiple separate files, typically one file per page or per a defined range, rather than letting you hand-pick which pages to keep. Use Split PDF when the goal is breaking a whole document apart rather than selecting a subset from it.
Organize PDF changes the order or composition of pages within a document, including reordering, combining files, or removing pages, all inside an editing view rather than producing a standalone extract. Use Organize PDF when you're restructuring a file you'll keep working in, not pulling a piece out of it.
Delete PDF Pages removes specific pages from a document permanently, the opposite operation from extraction. Use Delete PDF Pages when the pages you don't want are the problem, rather than the pages you do want.
A quick way to decide: want a copy of just a few pages, extract them. Want the whole file broken into pieces, split it. Want to rework the file itself, organize it. Want certain pages gone for good, delete them. Merge PDF can combine everything back into a single document.
● If recovered pages end up out of their original sequence, Organize PDF lets you drag them back into the right order before finalizing the file.
It's free, with no fees or limitations. Fix as many PDFs as needed, from small files to large, complex ones.
Yes. The tool is browser-based, so it works on Windows, macOS, Linux, and on mobile phones and tablets.
Uploads are encrypted and files are deleted from the server about an hour after repair, keeping sensitive information private throughout the process.
No. Repairs are built to retain the material and design quality of the original PDF, with text staying sharp and images staying intact.
● Confirm the shared "...or drop images here" upload component is fixed site-wide; this is now the fourth page flagging the same issue.
● Get a product decision on ad-supported free messaging (now flagged on two of four pages reviewed) and apply it consistently.
● Confirm with product whether "Not necessarily" in the live quality FAQ reflects a real edge case for severely corrupted files; rewritten copy below assumes a more direct "No," pending confirmation.
● Confirm target URL matches the live slug exactly: https://pdf24.ai/repair-pdf (no /en/ prefix).
● Verify all internal links resolve: /unlock-pdf, /compress-pdf, /extract-pdf-pages, /extract-pdf-images, /merge-pdf, /organize-pdf.
● Confirm the General Questions About PDF24 block is removed from this page and replaced with a single link to /documentation.
● Confirm FAQPage structured data reflects only the four tool-specific FAQ entries, not the removed general block.
● Verify the Rewritten Page Copy section (body copy only) is 1,300+ words: isolate that section to plain text and run wc -w on it directly, separate from the full-document count.
● Spot-check the Repair vs. Compress vs. Unlock section against those pages' live copy once drafted, to keep tool descriptions consistent across pages.
● Proofread for em dashes (should be none) and confirm tone matches approved style (no fluff, no AI-sounding phrasing).
Yes, PDF24 is completely free to use. There are no hidden charges or subscriptions.
Absolutely. All tools are online and work in your browser. There's no need to download or install any software.
Yes, all uploaded files are processed securely, and all temporary files are automatically removed once they have been processed.
PDF24.AI can be used to create PDFs, Word, Excel, PowerPoint, HTML, as well as JPG, PNG, JPEG, TIFF, and more.
Yes, you can edit text, fill out forms, or sign documents in PDF online with the PDF Editor tool.
Use the Extract Images from PDF tool online. By doing so, you can convert the embedded images in it to the most popular file formats in practically no time.
The Compress PDF tool will compress your files while maintaining text readability and image clarity.
The majority of tools process large files quickly; very large documents may take a little longer to process.
Yes, with the Sign PDF tool, you are able to sign and securely manage digital signatures.
Yes, each tool is 100% mobile responsive and can be used on smartphones or tablets for managing documents on the go.