A PDF is usually the document you would least like to upload. Contracts, tax returns, medical letters, passport scans, the deck that has not been announced yet — these are the files people put through free web tools every day, and every one of those tools copies the file to a server first. These do the same work in the page. The document is parsed, rewritten, and handed back by JavaScript running on your own machine, which is why there is no queue, no size ceiling, no watermark, and nothing to delete afterwards: there was never a copy to delete.
- 01
Combine a report and its annexes without losing the bookmarks
Drop the files into the merger in the order you want them. It reads each document's bookmark tree, shifts every entry to its new page number, and writes the whole thing back as one outline — the navigation pane that ordinarily comes out empty. It also tells you what the merge costs before you download: form fields that stop being fillable, internal links that no longer resolve, and whether the page sizes match.
- 02
Send one chapter instead of the whole manual
Open the document, click the pages you want, and take them as their own file. Nothing is uploaded, so a 400-page internal manual can be trimmed to the six pages a supplier asked for without the other 394 leaving the building.
- 03
Fix a scan that came in sideways
Rotating pages is the one PDF job that is faster with pictures than with page numbers. The page grid draws every page, so you turn the four that came out of the feeder the wrong way round by looking at them.
- 04
Work with a document you are not allowed to upload
Legal, medical, and HR documents are frequently covered by a policy that forbids third-party processing outright. A tool that never makes a request with the file is the difference between doing the job and not doing it — and it is checkable: open the network tab, or disconnect after the page loads and keep working.
Nothing is uploaded, and the claim is checkable
Tinapps PDF tools read and rewrite the document in the browser using pdf-lib and pdf.js, both served from this site. No request carries the file, no server sees it, and the tools keep working with the network disconnected once the page has loaded.
No signup, no queue, no watermark, no page limit
The upload-based services cap free use at a file count, a megabyte ceiling, or a number of tasks per hour, and several stamp the output. There is nothing here to meter: the work runs on your own processor, so the only limit is the memory your browser has.
The tools report what an edit costs
A PDF carries more than pages: an outline, form fields, links, attachments, metadata. Most editors silently drop some of them. Tinapps PDF tools count what a document holds before the edit and say which parts survive it, so a loss is a decision rather than a surprise.
Pages are pictures, not numbers
Every page tool draws thumbnails of the real pages with pdf.js, so choosing what to keep, rotate, or delete is a matter of looking rather than remembering. Thumbnails appear progressively as they render, and a page that will not rasterise is still editable.
Honest about what the browser cannot do
A password-protected PDF cannot be opened without its password by any tool, including this one, and the message says so instead of failing vaguely. Where a limit is real — recompression, encrypted files, very large documents against tab memory — it is stated on the page rather than discovered on download.
Are PDF files uploaded when using these tools?
No. Tinapps PDF tools do all of their work in the browser: the file is read from disk by the page, rewritten in memory, and handed back as a download. No copy is sent to a server, which also means there is nothing to expire, delete, or trust a retention policy about.
Is there a file size or page limit on the Tinapps PDF tools?
There is no limit imposed by the tools — no page cap, no megabyte ceiling, no daily task count. The practical ceiling is the memory a browser tab can allocate, which on a desktop machine comfortably covers documents of several hundred megabytes and on a phone is considerably lower.
Do these tools add a watermark to the PDF?
No. Tinapps PDF tools never stamp the output, and there is no paid tier that removes something. The file you download contains your pages and nothing added to them.
Can a browser-based tool open a password-protected PDF?
No, and neither can the upload-based ones without the password. An encrypted PDF has to be decrypted with its password before anything can read the page content, so the honest path is to open it in a PDF viewer, save an unprotected copy, and work from that.
Do the Tinapps PDF tools work offline?
Yes, once the page has loaded. The PDF libraries are fetched on first use and everything after that is local computation, so you can disconnect the network and keep merging, splitting, and rotating documents.
What happens to bookmarks and form fields when a PDF is edited?
It depends on the edit, and the Tinapps PDF tools say which. Bookmarks are read out, renumbered, and written back, so an outline survives a merge or a split instead of disappearing. Form fields are the harder case: the tools offer to flatten them, which paints their current values permanently into the page, because a copied field that is no longer connected to the document's form dictionary looks fillable and is not.