PDF Compressor
PDF Compressor is a free online tool that lets you bulk-compress PDFs (up to 50). Shrinks embedded images while keeping text and graphics sharp — pick Extreme, Recommended, or Less. It runs entirely in your browser — no sign-up, no watermark, and your files are never uploaded.
Free · unlimited · processed privately in your browser
or drag and drop files here
Supported: PDF · up to 50 files
Your files stay private — 100% in your browser
We never upload your files, photos, or videos to any server. Everything is processed directly in your browser, so your data never leaves your device. That means zero privacy worries — no one else can ever see or store what you convert.
- No uploads
- Processed on your device
- No sign-up needed
About PDF Compressor
Make PDFs smaller with this free online PDF compressor. It rasterizes pages with an adjustable quality setting to reduce size — ideal for scanned or image-heavy PDFs. A free PDF compressor that works online in your browser with no watermark or sign-up. Everything runs directly in your browser, so your files are never uploaded to a server and stay completely private.
After you upload
Choose how you want to control the result — by quality level, or by an exact target size. Text and vector graphics always stay sharp — only embedded images are shrunk.
Options explained
- By quality level / To a target size
- Two ways to compress. 'By quality level' picks a fixed Extreme/Recommended/Less setting. 'To a target size' lets you name a size like 100 KB or 1 MB and we shrink the images step by step until the file fits.
- Compression level
- Extreme gives the smallest file with the most image quality loss; Recommended balances size and quality; Less keeps images crisp with a gentler size cut. Choose based on whether size or quality matters more.
- Target size (KB)
- Name the size you need — drag the slider or type an exact number. We re-compress the embedded images harder and harder until the PDF lands at or under it.
How to use PDF Compressor
- 1Click Choose Files and upload your PDF.
- 2Choose a quality level to control the size reduction.
- 3Press Run to compress the PDF in your browser.
- 4Download the smaller PDF.
Frequently asked questions
What is a PDF compressor?
A PDF compressor reduces the file size of a PDF so it is easier to email, upload, or store, while keeping the document readable.
How do I compress a PDF?
Upload your PDF, choose a quality level, press Run, and download the smaller file. It all happens in your browser.
What is the best free PDF compressor?
The best free PDF compressor reduces size with no watermark and keeps files private. Ours works online in your browser with no limits.
Which is the best PDF compressor?
The best PDF compressor balances size and readability. Ours is most effective on scanned or image-heavy PDFs, where it can greatly reduce size.
What is the best PDF compressor for large files?
For large, image-heavy PDFs, a rasterizing compressor like ours works well. Lower the quality to shrink very large files further.
Can I compress a PDF to 100kb or 200kb?
Lower the quality to shrink the file. Reaching an exact target such as 100kb or 200kb works best for scanned/image PDFs.
Why didn't my text PDF get much smaller?
This compressor works best on scanned or image-heavy PDFs. Text-only PDFs are already small and may not reduce much.
Are my PDFs uploaded?
No. The online PDF compressor runs locally in your browser, so your documents stay private.
How to compress a pdf to 100kb?
Use PDF Compressor above: upload your file, run it, and download the result. It is free with no limits or sign-up, and your document is handled right inside your browser and is never uploaded, so sensitive content never leaves your computer.
How to compress a pdf to 1mb?
Use PDF Compressor above: upload your file, run it, and download the result. It is free with no limits or sign-up, and your document is handled right inside your browser and is never uploaded, so sensitive content never leaves your computer.
How to compress a pdf without losing quality?
Use PDF Compressor above: upload your file, run it, and download the result. It is free with no limits or sign-up, and your document is handled right inside your browser and is never uploaded, so sensitive content never leaves your computer.
How to compress a pdf on mac?
Use PDF Compressor above: upload your file, run it, and download the result. It is free with no limits or sign-up, and your document is handled right inside your browser and is never uploaded, so sensitive content never leaves your computer.
How to compress a pdf on iphone?
Use PDF Compressor above: upload your file, run it, and download the result. It is free with no limits or sign-up, and your document is handled right inside your browser and is never uploaded, so sensitive content never leaves your computer.