Repair PDF — Fix Damaged PDFs Online
Attempt to fix a corrupted or damaged PDF file.
Drop your PDF file hereTap to select a file
Supports PDF, up to 200MB
What to do next
Related tools
About Repair PDF
Repair PDF is a single-page tool for the common PDF document workflow task it is named after. Attempt to fix a corrupted or damaged PDF file. The interface keeps the input on one side, the configurable options in the middle, and the result on the other side. Most jobs start and finish without any scrolling.
The engine behind the page is the open-source pdf-lib JavaScript library. It reads your file in-memory and writes the result back into the browser. Supported inputs include PDF. For 200 MB and below the work usually completes in seconds; larger files mostly depend on how much spare RAM your device has.
The right moment to reach for Repair PDF is when you have a focused PDF document workflow job that fits inside a browser tab. Open the page, drop in the file or paste your input, choose the options that matter, and the tool returns the result.
The architecture is local-first by design. Once the page is loaded, you can disconnect from the network and the tool still completes the job. The processing stack — the open-source pdf-lib JavaScript library and the small UI shell wrapping it — ships with the page itself, so the tool keeps working in offline conditions, on a captive-portal Wi-Fi, or behind a corporate proxy that limits what the tab can reach.
On limits: 200 MB per file is the ceiling. Output formats and quality settings are listed in the controls panel above, and they apply to every run.
Even on its own, Repair PDF composes well with the rest of your toolkit. The output is a standard PDF file that opens in any program that handles the format, so the result of one run can become the input to whatever step you use next.
Repair PDF sees the most use from students assembling reading packets and legal teams preparing exhibit bundles, but the design is intentionally generic enough that you do not need a specialist background to get a good result. The defaults aim at the most common case so a first-time user can get the right output without changing any settings.
Output handling is intentionally boring: Repair PDF produces `{name}-repaired.pdf` and triggers your browser's standard "save" behaviour. If you have a default download folder configured, that is where it will land. There is no Favtoo-side history of jobs you have run.
Repair PDF keeps the control set focused. Every option on the page is there because a real workflow needs it, and the defaults aim at the most common case so a first-time user can get the right output without changing any settings.
Repair PDF is one example of a broader pattern: utility software increasingly works as single-page, client-side experiences. Every page in the catalog is shaped that way, which keeps each tool fast to load and easy to recommend in a single link.
Pro tip: Repair PDF works just as well in a private/incognito window as in a normal one, which is occasionally useful when you want zero browser-history footprint of the job. Another tip: if the tool ever feels slow, it is almost always because the browser tab is competing for CPU with another tab — pausing or closing the heavy ones gives the engine room to work.
Repair PDF is built around the moment of need: a focused page you open when you have a specific task, complete the task, and close. The catalog contains many adjacent tools so the same model serves the surrounding parts of a typical PDF document workflow workflow.
If Repair PDF appears to hang, the engine is almost certainly still working — large inputs simply take longer to process inside a browser than they would on a server with multi-core scheduling. For inputs near the 200 MB cap, give it up to a minute on a typical laptop before assuming something is stuck.
If Repair PDF solved your problem, sharing the page link with someone who has the same problem is the most useful thing you can do. The catalog grows mostly through word of mouth; visitors arriving through a recommendation tend to be the ones the tool serves best.
How it works
- 1Open Repair PDF in your browser. The page loads quickly and the tool is ready to use the moment it becomes interactive.
- 2Select the PDF file you want to process — drag-and-drop and the file picker both work.
- 3Pick any non-default settings you need. Most users leave the defaults alone for the first run and only revisit if the result needs tuning.
- 4Trigger processing. the open-source pdf-lib JavaScript library reads your input, applies the transformation, and writes the result back into the page.
- 5Save the output (`{name}-repaired.pdf`) when it is ready.
- 6Run additional jobs as needed. The same controls and defaults apply on every run.
Common use cases
- Send a polished, print-ready PDF to a client without watermarks using Repair PDF.
- Compress a marketing deck so the email send-out finishes in seconds.
- Shrink a scanned report so it fits past an email gateway.
- Add page numbers to a draft report before circulating it for review.
- Prepare a packet of receipts for an expense report submission.
- Split a 200-page exhibit bundle into one PDF per exhibit.
- Strip blank or test pages from a scanned document.
- Lock a confidential document with a password before sharing externally.
- Rotate scanned pages that came in upside-down from the office scanner.
FAQ
What kinds of damage can be fixed?
Structural issues like broken cross-references and malformed headers. Severely corrupted files may not be recoverable.
Will I lose any content?
The tool tries to preserve all content. Some elements may be lost if they were in a corrupted section.
How does the repair work?
The PDF is parsed, the structure is rebuilt, and a clean version is saved.
How is Repair PDF different from desktop apps that do the same thing?
Desktop apps usually have more advanced features but require installation, maintenance and (often) a licence. Paid online tools are convenient but route your file through their servers and gate downloads behind accounts. Repair PDF sits in between: free, instant, and private, but intentionally narrow in scope. For one-off jobs and the common PDF document workflow operations, it is usually the lowest-friction choice; for highly specialised work, a dedicated app is still the right answer.
Is Repair PDF mobile-friendly?
Repair PDF runs in any modern mobile browser — Safari, Chrome, Firefox and the in-app browsers in most messaging apps all support the underlying APIs. Performance depends on the device: a recent phone handles typical inputs nearly as fast as a laptop, while older devices may take a few seconds longer near the 200 MB ceiling. The interface lays out cleanly on small screens, so you do not need to pinch-zoom to see the controls.
How often is Repair PDF updated?
Repair PDF is updated whenever the underlying engine releases an improvement or a bug fix. Because the tool is delivered as a static page, every visit fetches the latest version automatically — there is no "version" to manage on your end. If a particular release ever changes default behaviour, the change is documented on Favtoo's changelog so you can confirm what shifted.
Can I use Repair PDF for commercial work?
Repair PDF can be used for personal and commercial work alike — there is no separate "business" licence to purchase. The output you generate is yours to use however you want, including in client deliverables, internal documents, or commercial products. Favtoo's only ask is fair, individual use; the tool is not designed to be embedded as a backend service or wrapped behind an API for resale.
Does Repair PDF need an internet connection to run?
Once the page is loaded, Repair PDF can complete jobs without an active internet connection — the engine is bundled with the page, so there is no per-job network call. The initial page load does require a connection (to fetch the static assets), but after that you can disconnect entirely and the tool will still work. This is a side-effect of the local-first architecture, not a deliberate "offline mode" feature.
Do I need a specific browser to use Repair PDF?
Repair PDF works in any modern browser released in the last few years — Chrome, Edge, Firefox, Safari, Brave, Arc and the major Chromium derivatives are all supported. The underlying engine relies on widely-supported web APIs, so there is nothing exotic to install. If you are on a very old browser version and the tool fails to load, updating to the latest release of your preferred browser is the only fix needed.
Why is my browser prompting me when I open Repair PDF?
Repair PDF only needs the standard web platform — file picker access for the inputs you choose to load, and optionally clipboard access if you copy the result rather than downloading it. There is no microphone, camera, geolocation or background-permission request, because none of those are needed for the work the tool does.
Does Repair PDF match what professional tools produce?
Repair PDF is built on the open-source pdf-lib JavaScript library, which is the same class of engine used by professional PDF document workflow pipelines. For deterministic operations, the output is byte-identical to what an equivalent CLI run would produce; for operations involving a codec or a model, the result is well within the range of what comparable tools generate. If you have a specific reference output you need to match, run a small test job first to confirm the configuration produces what you expect.