How do I reduce the size of a PDF?
Most people need a smaller PDF because something refuses the big one. An email provider bounces the attachment, a job application form caps uploads at a couple of megabytes, or a scanned contract takes ages to send. Compressing fixes that without changing a single word of the document.
The tool looks for the images inside your PDF and re-encodes them at a lower weight, because that is where nearly all the size of a heavy file lives. Text, fonts and page structure are left as they are, so words stay sharp at any zoom and remain searchable. Strong trades more image detail for a smaller file, Balanced aims for a sensible middle, and Light holds on to as much quality as it can. Each level shows an estimated result size before you commit.
Tip: Keep your original file. If the compressed copy looks too soft, go back to the untouched original and try a lighter setting rather than compressing the result again.
How do I compress a PDF to under 1 MB, 500 KB or 200 KB?
When a form states an exact limit, use the target size option. Choose 100 KB, 200 KB, 500 KB or 1 MB, or enter your own number, and the tool works toward that size instead of making you guess between levels.
Be realistic about what is possible. A short scan of a few megabytes can often drop well below 500 KB. A forty page report full of typed text may already be close to as small as it can get, because there are few images left to shrink. If you can’t reach the limit, cut pages you don’t need, or split a long document and upload it in parts. Smaller targets also mean softer images, so check that small print and stamps are still readable.
Can I compress a PDF without losing quality?
Text never loses quality here, because it is not touched. Images are where the trade-off sits. A few habits keep them looking good:
- Start with Light or Balanced. Move to Strong only if the file is still too big.
- Compress once. Running an already compressed file through again rarely helps and adds blur.
- Trim first. Removing pages you don’t need makes the file smaller before compression even starts.
- Zoom in on what matters. Check signatures, stamps and fine print in the result before you send it.
- Compress parts, then merge, when only one section is heavy. That way the rest keeps full quality.
Is it safe to compress PDFs online?
It is here, because the PDF is never uploaded. Many online compressors send your file to a remote server and process it there. This page loads the compression code into your browser, and the work happens on your own phone or computer from start to finish. You can check it yourself: open your browser’s network tab while you compress, and you will see that your file is not sent anywhere.
That matters for the documents people usually shrink: scanned passports, tax forms, payslips, medical letters and signed contracts. The output is a standard PDF that opens in any reader, ready to attach or upload.