Question 1

Is this really free with no limits?

Accepted Answer

Yes. No signup, no daily caps, no watermarks, no file size restrictions beyond 200 MB. All editing runs in your browser.

Question 2

Are my PDFs uploaded to a server?

Accepted Answer

No. Editing happens entirely in your browser using WebAssembly and the Canvas API. Your files never leave your device.

Question 3

Can I edit existing text in the PDF?

Accepted Answer

You can cover existing text with a whiteout box and add new text on top — the standard browser-based editing approach. True in-place text replacement requires the original fonts and is supported by Adobe Acrobat only.

Question 4

What can I add to my PDF?

Accepted Answer

Text with custom fonts and colors, images, highlights, freehand drawings, shapes (rectangle, circle, line, arrow), signatures, and whiteout boxes.

Question 5

Can I reorder, rotate, or delete pages?

Accepted Answer

Yes. Use the page thumbnail sidebar to drag-reorder, rotate any page in 90° increments, or delete pages you do not want.

Question 6

Does PDF Editor upload my file to a server?

Accepted Answer

Your file is processed inside your browser by the open-source pdf-lib JavaScript library. The engine reads the file's bytes from your tab's memory, computes the result, and writes the result back into the tab. You can confirm what the page does by opening developer tools and watching the Network tab during a run — the requests you see are for the tool's static assets only.

Question 7

Will PDF Editor ask me to pay to download the result?

Accepted Answer

PDF Editor is free to use. The processing runs in your browser, which keeps the per-user cost low enough that the tool can be offered openly. The download is the same file the engine produced — you can use it for as many runs as you need.

Question 8

What does PDF Editor do that command-line tools do not?

Accepted Answer

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. PDF Editor 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.

Question 9

Is PDF Editor lossless?

Accepted Answer

PDF Editor is built to preserve quality wherever the underlying PDF format allows it. Operations that are mathematically lossless (e.g. structural transformations, lossless re-encoding) round-trip with no perceptible change. Operations that involve a lossy codec inevitably introduce small artefacts at the byte level, but the defaults aim at the sweet spot where output looks or sounds the same to a normal viewer or listener while still being meaningfully smaller or faster than the input.

Question 10

What is the maximum file size for PDF Editor?

Accepted Answer

Inputs are capped at 200 MB per file, which keeps memory usage stable across phones, tablets and older laptops. You can run PDF Editor as often as you need; every run produces a full-quality result.

Question 11

Will PDF Editor keep working in a year?

Accepted Answer

PDF Editor 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.

Question 12

Is the source for PDF Editor available?

Accepted Answer

PDF Editor is a static page running an open-source engine in your browser, so a typical corporate firewall does not get in the way as long as it allows JavaScript to load from Favtoo. For teams that need to host it themselves on an internal network, the underlying engine (the open-source pdf-lib JavaScript library) is open-source and can be packaged into a private build with the same behaviour. Reach out via the Contact page if that is something you are exploring.

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