How it works
Upload, compress, download.
Choose a PDF, select the target size you need, and wait for the compressed version to be prepared. The download starts only when you click the button.
Online PDF compressor
Reduce PDF file size online.
Upload a PDF, choose a target size from 100KB to 2MB, and download a smaller file. No account required.
No account requiredTargets from 100KB to 2MBReview before downloadFiles processed temporarily
500KBPopular target size for upload portals.
Before / afterCompare file sizes before downloading.
No loginCompress a PDF without creating an account.
Common target sizes
Reduce PDFs for forms and email.
Use common limits such as 100KB, 200KB, 500KB, 1MB and 2MB for portals, applications, tender uploads and attachments.
100KB200KB500KB1MB2MB
Choose a PDF →Compression process
See how the file gets smaller.
The tool checks the PDF, compresses images and PDF streams, then shows the new file size before you download.
PDF
PDF
Upload PDFChoose target sizeCompressDownload
Simple PDF compression
Make a PDF smaller for common upload limits.
Choose a target size
Pick a target from 100KB to 2MB. Smaller targets may reduce image quality, especially on scanned PDFs.
Compare before and after
See the original size, compressed size and percentage reduction before saving the file.
Download when ready
The compressed PDF is not downloaded automatically. Review the result first, then download it yourself.
Questions
PDF compression FAQ
Is PDF Size Reducer free?
Yes. You can compress PDFs online without creating an account.
What target sizes can I choose?
You can choose common target sizes from 100KB to 2MB. Smaller targets may reduce image quality.
Will compression reduce PDF quality?
Sometimes. Image-heavy or scanned PDFs may look less sharp at smaller target sizes. Always review the compressed PDF before submitting it.
What happens if my PDF cannot reach the selected size?
Some PDFs are already optimised or cannot reach very small targets without heavy quality loss. If that happens, try a larger target size.
What types of files can I upload?
Upload PDF files only. The current maximum upload size is 50MB.
Does the file download automatically?
No. The compressed PDF is shown as ready first, and you choose when to download it.