Compress PDF
Reduce PDF file size, down to the exact limit a website asks for. Your file never leaves your device.
- Never leaves your device
- No limits
- No sign-up
- No watermark
Quick answer: To compress a PDF, select the file, choose a level (Recommended or Strong) or a maximum size such as 100KB or 1MB, and click "Compress PDF". Compression runs in your browser and the smaller file downloads instantly, with no sign-up and no watermark.
How to do it in 3 steps
- 1Select the PDF or drop it in the area above.
- 2Choose a compression level or the maximum size the website requires.
- 3Click Compress PDF and download the smaller file.
Why use Pronto Arquivo
Exact target size
Pick 100KB, 200KB, 500KB, 1MB, 5MB or any value. The tool tunes quality until the file fits.
Never uploaded
Compression runs in your browser. ID cards, certificates and application documents never touch a server.
Text kept whenever possible
We shrink images first, so text stays selectable. Pages are only turned into images when there's no other way to reach the size, and we tell you.
No size or usage limits
PDFs over 100MB or 200MB aren't blocked. The only limit is your device's memory.
Size shortcuts
Guides
PDF size limits for online applications
Government, university and job portals often cap uploads at 100KB, 200KB, 500KB or 1MB. Choose that size and the tool finds the best quality that fits, so the upload doesn't get rejected.
Compress a PDF without breaking a digital signature
Any compression changes the file and invalidates a certificate signature. Compress before signing. If the PDF is already signed and too large, ask for a version without images or split the attachments.
Why some PDFs barely shrink
Text-only PDFs, like those exported from Word, are already small: most of a PDF's weight comes from photos and scanned pages. In that case, compressing to an exact size converts pages to images to go further.
Frequently asked questions
Is it free to compress PDFs here?
Yes. It's free, with no usage limits, no sign-up and no watermark.
Does compressing reduce quality?
With Recommended, images are optimized and the difference is usually invisible. The smaller the target, the more detail photos lose. Text stays sharp.
How do I compress a PDF to 100KB or 200KB?
Select the file and tap 100 KB or 200 KB under "Or pick a maximum size". The tool tries progressive reductions until it fits.
Is my PDF uploaded or stored?
No. The file is processed in your browser and never leaves your device.
Can I compress a PDF on my phone?
Yes. It works in the browser on Android and iPhone, no app needed.
What if the PDF can't reach my target size?
We show the smallest size possible while keeping it readable. In that case, split the PDF and upload it in parts.