Choose optional lossless compression or stronger image compression to reduce PDF size. Scanned images and text may lose sharpness at stronger levels.
Drop PDF here or click to open
Supports PDF files up to 100MB
Select the PDF file you want to compress.
Select compression level based on your needs.
Get your smaller PDF file.
Use this PDF compressor when a document is too large for email, upload portals, or messaging apps. You can choose a normal quality level, or use target-size presets when you need to compress a PDF to 100KB, 200KB, 500KB, or 1MB.
Target-size compression tries increasingly strong settings and returns the closest result if the file cannot honestly fit under the chosen limit. Scanned and image-heavy PDFs usually shrink the most; text-heavy PDFs may already be near their minimum size.
Yes. OnePDFs is free to use, requires no account, and does not add an extra OnePDFs branding watermark; watermark tools add only the watermark you choose.
Your files stay on your device and are processed locally in your browser; no upload to our PDF processing service is required. A browser copy can remain in this site's IndexedDB until you clear site data or the browser evicts it.
Yes. Choose the target-size mode and select 100KB, 200KB, 500KB, 1MB, or a custom KB value. If the PDF cannot reach a very small target without unreadable pages, OnePDFs returns the closest result and tells you whether the target was reached.
Target-size compression starts with gentler settings and becomes more aggressive only when needed. Text remains sharp; scanned images may become softer at small targets.