PDF tools

Compress a PDF online, privately

Make PDFs smaller without uploading them anywhere. Byteshrink rebuilds the document right on your device, and lets you control the quality and choose which pages to keep.

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Files never leave your device. Compression, cropping and packaging all run in your browser. Byteshrink has no upload endpoint and no file storage.

Compress a PDF

Shrink PDF file size in your browser — no upload, no watermark.

Drag & drop files here

PNG, JPEG, WebP or PDF — add as many as you like

Nothing is uploaded. Files stay in this browser tab.

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How it works, step by step

  1. Step 1

    Add PDFs

    Drop in one or more PDF files. Byteshrink shows the page count.

  2. Step 2

    Pick how far to go

    A light option keeps text selectable; the stronger options shrink more.

  3. Step 3

    Fine-tune

    Adjust the quality, and choose a range of pages if you only want some.

  4. Step 4

    Preview

    See the old size next to the new one.

  5. Step 5

    Download

    Save the smaller PDF, or one ZIP file if you did several.

Two ways to shrink, your choice

Which one is best depends on whether your PDF is mostly text or mostly pictures.

  • Shrink scanned pages

    The stronger options take a fresh, lower-resolution snapshot of each page. This is the biggest saving for scans and picture-heavy documents.

  • Keep your text

    Prefer to keep text you can select and search? The light option only removes hidden document information and tidies the file up.

  • Keep only some pages

    Pull out just the pages you need — for example a short extract from a long report — and shrink those.

What to expect

Every option is a trade-off, and Byteshrink is upfront about it.

Turning pages into pictures gives the biggest size drop, but the text can no longer be selected or searched. For contracts and anything you need to quote from, use the light option instead.

Very large or password-protected PDFs may be slow or may not open, because all the work happens on your own device rather than a server.

PDF compression FAQ

Are my files uploaded to a server?

No. Every step — opening the file, cropping, resizing, making it smaller and bundling several together — happens right inside the web page on your own device. Your files never leave your computer or phone, and nothing is kept once you close the tab.

How can a PDF be made smaller without a server?

For scanned or picture-heavy PDFs, Byteshrink takes a fresh, lower-resolution snapshot of each page and saves those as a new PDF. If you would rather keep the text selectable, there is a lighter option that just removes hidden information and tidies the file up.

Will making a file smaller lower the quality?

For JPEG and WebP, a lower quality setting trades some fine detail for a smaller file. The preview step shows the original and the smaller version side by side, so you can pick a setting you are happy with before downloading. PNG stays perfectly sharp unless you turn on the colour-saving option.

Is there a file size or count limit?

There is no set limit. The real limit is how much memory your device has, since all the work is done locally. Byteshrink warns you when a file is big enough that it might be slow.