Optimize a PDF
Rebuild the file compactly, drop leftovers from previous edits, compress pictures and strip metadata.
Compression re-renders image-heavy pages as JPEG images. With “Keep text selectable” on, pages made of text and vector graphics are only re-saved and stay searchable; pages that are mostly pictures are flattened.
Drop your PDF files here or click to browse
Stays on your device — nothing is uploaded
Select several files to process them together
How do I optimize a PDF for free?
Open PDFkitt's Optimize PDF tool (pdfkitt.com/optimize-pdf/): choose the PDF, decide about images, optimize, then download. It is free, needs no account and adds no watermark, and it runs entirely in your browser — the file is never uploaded to a server.
- Price
- Free — no trial, no paid tier, no watermark
- Account
- Not needed
- File upload
- None — processed on your device, in the browser
- Input
- PDF files (several at once)
- Limits
- No daily quota and no file-count limit
- Works on
- Windows, macOS, Linux, iPhone, iPad and Android, in any modern browser
Updated · by the PDFkitt team
PDFs that have been edited, merged and re-saved many times carry dead weight: unused objects, duplicated resources, uncompressed structures. Optimize rewrites the whole file compactly with object streams, which alone often saves 10–30% with no visual change at all. Optionally compress images and remove metadata for a lean file that opens fast.
This is the “lossless first” tool: with images left alone, nothing about the appearance changes. The rebuild happens in your browser.
How to optimize a PDF
- Choose the PDF One or many.
- Decide about images Leave them for a lossless result, or compress them.
- Optimize The file is rebuilt on your device.
- Download Compare the sizes.
Why use PDFkitt to optimize PDF?
The file is processed inside your browser tab. Disconnect from the internet after the page loads and it still works.
No signup, no email, no daily quota, no page limit, no watermark. Use it as often as you like.
Phone, tablet or desktop, in Chrome, Safari, Edge and Firefox. Nothing to install.
Frequently asked questions
Is lossless really lossless?
Yes — with images left alone, page content is untouched; only the file structure is rewritten.
Why is the file bigger after optimizing?
Rare, but possible for tiny files that were already optimal. Keep the original in that case.
Is my PDF uploaded to compress it?
No. Pages are re-encoded inside your browser; the file never leaves your device.