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A Smallpdf alternative that never uploads your files

Smallpdf is a capable and very popular toolkit, but it works by uploading your documents to its servers for processing. If your PDFs are contracts, statements or anything private, that upload is exactly what you may want to avoid. Koy PDF does the same everyday jobs inside your browser, so the file never leaves your device.

0 Bsent to the internet
Outgoing requests from this tab
    or drop it here JPG or PNG photos work too

    Koy PDF vs Smallpdf

    Koy PDFSmallpdf
    Where the file is processedOn your device, inside the browserOn their servers
    Does your file leave your device?NeverYes, it is uploaded for processing
    What happens to the file afterwards?No copy: it never existed outside your deviceDeleted after a while, according to their policy
    Works offlineYes, after the first visitNo
    Sign-up or accountNoFor some features or to lift limits
    Free plan limitsNoneTasks per day or file size
    Preview before processingYes: estimated size, pages, partsNo
    PasswordsUsed only in your browserTravel to the server with the file

    General facts about how server-side services work, taken from their own help and privacy pages. Each has plans and terms that change; check them if you need details.

    Nothing is uploadedYour PDF never leaves your device. There is no server to receive it.
    Nothing is storedClose the tab and no copy remains anywhere.
    Nobody sees your passwordIt is used only in your browser to open the file. We never know it.

    How it works

    How can nothing be uploaded?

    Traditional PDF tools work the other way around: they upload your file to a server, process it there and send the result back. Your document passes through someone else's computer, on a network you cannot see, and stays there as long as their policy says.

    Koy PDF brings the PDF engine to your browser instead of taking your file to the engine. When you open the page, the program that reads and writes PDFs (mupdf, compiled to WebAssembly) is downloaded, and from then on all the work is done by your computer or phone. There is no address to upload files to: it is not a privacy promise, it is the architecture.

    1. Open the pageThe PDF engine is downloaded to your browser once.
    2. Load your fileIt is read into your device's memory. It is never attached to a request.
    3. Download the resultIt is generated locally and goes straight to your downloads folder.
    Check it yourself

    You can check it yourself. The counter in the header adds up every byte leaving this tab and stays at 0 B while you work. And if you want to see it with your own tools, open your browser's Network tab and use any feature: you will not see a single request carrying your file. You can even disconnect from the internet and keep working.

    Frequently asked questions

    Is Smallpdf safe?

    Smallpdf encrypts the transfer and says it deletes files after a while. Even so, your document travels and is processed outside your device. Koy PDF removes that step.

    Does Koy PDF do the same?

    For the most common jobs, yes: compress to an exact size, merge, split, rotate, protect and unlock. It does not convert to Word or edit text.

    Do I need an account?

    No. There is no daily task limit or watermark either.

    All tools

    17 tools
    UnlockRemove the password and download a copy that opens without it.CompressShrink it down to the MB you need.SplitBreak it into several files, with the pages you choose.MergeJoin several PDFs into one, in the order you want.RotateTurn all pages or just some of them.ProtectAdd a password and restrict printing, copying or editing.Extract pagesKeep only some pages, or remove the ones you do not need.ReorderChange the page order by dragging thumbnails.MetadataSee, edit or wipe the author, title and dates hidden in the PDF.PDF to imagesExport each page as PNG or JPG.Images to PDFBundle JPG or PNG photos into a PDF.Extract textCopy or download the text as TXT.Extract imagesPull out the original images embedded in the PDF.WatermarkA text like “COPY” or “CONFIDENTIAL” over every page.Page numbersAdd the page number to the footer or header.SignDraw your signature and place it on any page.Fill formComplete the fields of a PDF form.

    All the work is done by your browser. We store no files and know no passwords.

    Works with protected PDFs (including AES-256). Only produces PDF files.

    My workflows