Compress PDF files in your browser
Compress PDF files free in your browser. Shrink a PDF's size by re-rendering pages at a quality you pick. Private, fast, no upload and no sign-up.
100% private — files never leave your deviceHeads up: this re-renders pages as images, so the text stops being selectable. Best for scanned or image-heavy PDFs.
How to use
- Upload your PDF. Drag a PDF onto the page or click to select one. It loads instantly in your browser with no upload.
- Choose a quality level. Pick the image quality used to re-render the pages. Lower quality means a smaller file; higher quality keeps pages crisper.
- Compress the file. Each page is re-rendered as a compressed image and rebuilt into a new, smaller PDF locally on your device.
- Download the result. Check the new file size, then save the compressed PDF straight to your device. Nothing is ever uploaded.
Features
- 100% private, no upload. Your PDF is compressed entirely in your browser with pdf.js and pdf-lib. Files never leave your device, so even confidential documents stay private.
- You control the quality. Choose the rendering quality to balance file size against sharpness, so you decide how small the PDF gets.
- Great for scans and images. Re-rendering pages as compressed images is ideal for shrinking bulky scanned or image-heavy PDFs.
- See the new size before saving. The result shows the page count and final file size so you can confirm the savings before you download.
- Free with no sign-up. Compress as many PDFs as you like for free, with no account, no installation, and no watermarks.
When to use it
- Shrink a scanned contract or signed agreement so it fits an email or upload size limit
- Reduce a heavy image-rich brochure or portfolio PDF before sharing it online
- Slim down a scanned receipt or invoice bundle for an expense report
- Compress a photo-heavy PDF so it fits a 25MB email or chat attachment cap
- Make a confidential scanned document smaller without ever uploading it to a third-party service
Is it private?
Your PDF is compressed entirely on your device with pdf.js and pdf-lib, and is never uploaded to any server.
Frequently asked questions
Is this PDF compressor free?
Yes, it is completely free. There is no sign-up, no installation, no watermarks, and no limit on how many PDFs you can compress.
Are my files uploaded to a server?
No. Your PDF is re-rendered and rebuilt entirely in your browser using pdf.js and pdf-lib. Nothing is ever uploaded, so it is safe for confidential or sensitive documents.
Will the text in my PDF still be selectable?
No. This tool rasterizes each page, meaning it re-renders pages as images, so text and links are no longer selectable or searchable in the compressed file. That is why it works best for scanned or image-heavy PDFs you mainly need to view or share.
What kind of PDFs does this work best on?
Scanned documents and image-heavy PDFs, where most savings come from compressing the images. Text-only documents may not shrink much and will lose selectable text, so for those a different approach is usually better.
How much smaller will my PDF get?
It depends on the original file and the quality level you choose. Lower quality produces a smaller file, while higher quality keeps pages sharper. You can see the final size before downloading.
Does it work on large PDFs?
It handles multi-page PDFs, but because everything runs in your browser, very large files depend on your device's memory and speed. On low-memory phones, very big PDFs may be slow or may not finish.
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