Repair a damaged PDF
A file that won't open
Up to 200 MB at a time. On a phone, large documents take longer and need more memory.
Repair rebuilds the PDF structure when objects and pages can still be read. It can't bring back lost bytes, unreadable images or missing pages. Keep the original.
You can pick several PDFs. Each gets its own result, and you can also download them all as one ZIP.
Choose a PDF or drop it here Choose PDF files or drop them here Choose JPG, PNG or WebP images or drop them here Up to 200 MB at a time. On a phone, large documents take longer and need more memory. Working… Processing page {n} of {total}… Done. Download your file. Choose a file first. The selected files are over 200 MB. Pick a smaller file or fewer files. “{name}” is empty. Choose another file. “{name}” is not a PDF. Choose a PDF document. “{name}” is not a JPG, PNG or WebP image. Choose a supported format. This PDF is password-protected. Open it in a program where you have access, save a copy without the password and try again. Not enough memory for this job. Choose a smaller file, a lower resolution or fewer pages. The processing library didn't load. Refresh the page and choose the file again. This file can't be processed. It may be damaged or use an unsupported encoding. Save a fresh copy and try again. The PDF has no pages to process. Enter pages from 1 to {count}, for example 1-3,5. The end of a range can't be lower than its start. The result would use too much memory. Choose fewer pages or a lower resolution. “{name}” is too large to process in the browser. Resize it to 16 megapixels at most and no more than 10,000 pixels on the longer side. Download {name} Move up Move down Remove Page {n} Pages: {n} Loaded: {name}. Pages: {n}. Order updated. Download the new file when you've finished. Can't show a preview of page {n}. Choose just one PDF file here. Add at least two PDF files to merge. Keep at least one page. Pages (leave empty for all pages) For example 1-3,5,8-10. The first page is page 1. Bring back all pages Drag to change the order, or use the arrow buttons. Remove anything you don't want in the result. JPEG quality Smaller file (55%) Medium quality (75%) Better quality (90%) Image resolution 96 dpi 144 dpi 200 dpi To keep things stable on phones, each image is capped at 4 megapixels. Larger pages get a lower resolution automatically. Keep the original. Editing a PDF can invalidate a digital signature, and special features, forms and bookmarks may not carry over to the new file. Before: {before}. After: {after}. {percent}% smaller. Before: {before}. After: {after}. The new file isn't any smaller. If you don't need other changes, keep the original. Enter margins between 0 and 40 mm. Images selected: {n}. Try to repair Rotation from the original 90° clockwise 180° 270° clockwise (90° anticlockwise) Choose PDF Turn on JavaScript in your browser to process files. Settings changed. Run it again. Selected document Preview before you download Keep working on this file File for the next step Next step Continue Delete temporary files Temporary transfer files deleted. The file is kept for a short time in this browser only. It's deleted as soon as the next tool picks it up, or on your next visit after 15 minutes at the latest. Passing files between tools doesn't work in this browser. Download the result and choose it in the next tool. The transfer has expired, was already used or isn't available. Choose the file from your device. Compress PDF Merge PDF Rotate PDF Extract pages Insert pages Crop margins Change page size Pages per sheet Merge fronts and backs Remove blank pages Add page numbers Header & Bates numbering Add a watermark Convert to greyscale Flatten forms and comments Edit metadata Edit bookmarks Split by size or bookmarks Split by page ranges Convert to JPG Delete or reorder pages Check the values you entered. Numbers must be within the range shown. Type the text you want to add. Choose the second file too. Choose two PDF files for this. Find blank pages Tick the pages to remove. Look at each one before you confirm. No blank pages found. You can still tick pages to remove by hand. Possibly blank This page has content Remove page {n} Each line should read: page number | title. The page must exist in the document. The document has no bookmarks pointing to pages. You can add them with the Bookmarks tool. You can't remove every page. Keep at least one. Files loaded: {n}. You can pick several PDFs. Each gets its own result, and you can also download them all as one ZIP. Second file Choose another file Number position Bottom centre Top centre Pages are turned into images of up to 144 dpi (4 megapixels per page at most). Searchable text, links, bookmarks and fillable forms don't carry over. Check the preview first. Keep the original. Layout and content stay visible, but forms, links and comments are dropped when pages are combined. Digital signatures stop being valid. Start at Bottom centre Top centre Font size (pt) Pages (leave empty for all pages) Labels are placed on top of the existing content. Check that they don't cover any text. Forms, links and bookmarks stay in the document; digital signatures become invalid. Current bookmarks Result page Previous Next Done. The source had forms, links or comments, so the pages were turned into images to keep how they look. Text search and interactive features don't carry over. Merge the images into a PDF Sign PDF Fill in a form Edit PDF Redact data permanently Protect with a password Remove a known password Repair PDF Convert to PDF/A Page to edit Choose what to add and where. Add it with the button or drag your finger across the preview. Position and size are in percent of the page. From left edge (%) From top edge (%) Width (%) Height (%) Text What to add Add to page Undo last addition Clear additions on this page Draw signature Type signature Signature image Initials Date Text Rectangle Ellipse Line Highlight Note Permanent redaction How to sign Area for drawing your signature with a finger or mouse Clear drawing JPG, PNG or WebP image Colour Password to open Repeat the new password Owner password for changing restrictions Printing Copying text and images Editing the document Allowed Restricted This is my file, or the owner has allowed me to remove the protection. Enter the password you know. Protection is never bypassed. Wrong password. Enter the password you know and try again. The passwords don't match. Type the new password again. The password to open must be at least 8 characters. For restrictions, enter a different owner password of at least 8 characters. Confirm that you have the right to remove protection from this file. Choose just one file for this change. Add at least one item to the page. Choose the signature or image first. Draw your signature first. This PDF has no fillable fields. To type over a scan, use Edit PDF. This field isn't supported: {name}. Use the program the form was made in. Form fields Keep the fields editable Lock the filled-in fields This is a visible image of a signature with no certificate behind it. It is not a qualified electronic signature. Keep the original; any existing digital signatures become invalid once the file is changed. Every page is redrawn as an image of up to 144 dpi, 4 megapixels at most. Text, attachments, links, forms and metadata from the original are left out. The black areas contain none of the original data. PDF/A-2b keeps how the pages look by storing them as images of up to 144 dpi, 4 megapixels per page at most. Text is no longer searchable; forms, attachments, links and signatures don't carry over. If you're submitting it somewhere, check their requirements too. Repair rebuilds the PDF structure when objects and pages can still be read. It can't bring back lost bytes, unreadable images or missing pages. Keep the original. AES-256 encrypts the content. Print, copy and edit restrictions are only honoured by programs that support them. If you lose the password, we can't recover it. Enter the user or owner password you know for your own document. There's no password guessing and no getting round someone else's protection. Standard PDF forms (AcroForm) are supported: text fields, tick boxes, radio buttons and lists. XFA, calculations and digital signature fields are not. For a scan without fields, use Edit PDF. Additions are drawn on top of the page; existing text isn't changed. Notes and highlights stay visible in the new copy. For confidential data, use Redact data permanently. Choose a PDF first. Items added: {n}. Loaded: {name}. Enter the password you know and start. The PDF is encrypted with AES-256. The preview stays hidden until you open the document with its password. The new structure has been saved. Check every page before you replace the original. Image-based PDF/A-2b copy saved, with an embedded sRGB profile. The data has been blacked out for good in a new image-based copy. Check every marked area before you share it. This form uses XFA or has a digital signature. Open it in the program it came from; we don't change it here. The item runs off the page or the text is too long. Use a smaller font or resize the area. Check the text length and values in the form fields. Image Page preview with additions Before saving you can still move and add items. The original content stays underneath. Show password The password isn't kept in the address bar, browser history or temporary transfer. No extra restrictions Form saved. Check the filled-in values in the preview. Save the PDF tools for offline use Saving the PDF pages and programs, including OCR languages and the Office add-on (about 110 MB). Your documents are not stored in this cache. The PDF tools are saved for offline use in this browser. Passwords and documents are not in the cache. The browser may clear the cache later to free up space. Saving for offline use didn't work. Check your connection and free space; downloading results still works. Recognise text (OCR) Extract text Convert to Word Extract tables for Excel Convert to PowerPoint Extract images Compare PDF files Convert to PNG or WebP This browser can't save the chosen image format. Choose PNG and try again.Word back to PDFExcel back to PDFPowerPoint back to PDFAdvanced settingsCancelCancelled. You can try again.Start over← Change settings+ Add moreDone: {name} is readyPreviewKeep working on this fileRecognise text on scanned pagesLanguage of the scanned textFind sensitive dataCheck the suggestions and untick anything you want to keep.No sensitive data found.By bookmarksBy textEvery N pagesText that starts a new partPages per partspoji-pdf,potpisi-pdf,zastiti-pdf,pdf-u-jpg,sazmi-pdf,podeli-pdfResize; use the arrow keys for fine adjustmentThe file stays on your device. No sign-up.ImportantClose previewChoose a PDF fileChoose PDF filesSelect all pagesKey sentencesAll PDF toolsChoose another fileYour file stays on your device. No sign-up, no limits.
When a PDF won't open or throws an error, the cause is often a damaged cross-reference table, the index that says where each part of the file sits. Repair rebuilds it from whatever objects are still readable and saves a new copy. Anything missing from the file, such as the end of an interrupted download, can't be brought back.
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How it works
After repair, page through the whole document, paying attention to images and the last few pages. Don't delete the original. Sometimes another PDF reader will open a file that one reader refuses.
Choose the PDF and press “Try to repair”.
Worked example
An email attachment downloaded, but your reader says the file is damaged. Repair finds the pages, puts them into a new copy and the document opens again. If the download had stopped halfway, some pages will probably still be missing. In that case, downloading the attachment again is the better fix.
Questions people ask
Can every PDF be repaired?
No. If page content is missing or the file isn't really a PDF, rebuilding the structure won't help.
Does repair remove a password?
No. For your own protected file, use Remove PDF password.
Why does the PDF open on my phone but not on my computer?
Some readers are more forgiving of small errors than others. Repairing the file usually makes it open everywhere.
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Updated: 13 November 2026