Smaller file size, honest trade-offs
Move the slider right for original quality, left for maximum compression. Strong Compression re-renders pages as images (text becomes un-selectable); Safe preserves text and links but saves less. Results depend on the document.
Slide left to compress more (smaller file). At maximum (right), the file is re-saved with no quality loss. Results depend on the document — image-heavy PDFs compress best.
Safe: preserves selectable text, links & forms. Strong: re-renders pages as images — smaller output, but text becomes un-selectable.
Two modes, one goal
Safe Optimization
Strips redundant metadata, rewrites the structure, keeps text, forms and links. Reduction is usually modest.
Strong Compression
Re-renders each page to a smaller image at the chosen DPI and JPEG quality. Smallest output, but pages become images.
Download & compare
See original vs compressed file size. If results are insufficient, try Strong mode for maximum savings.
About compression
Do you upload my PDF?
No. Compression happens entirely in your browser. The file is not transmitted to any server.
What kind of savings should I expect?
It depends on the document. Documents dominated by a few high-resolution images compress the most. Text-only documents compress very little in Safe mode (there is little to remove). Strong Compression produces consistent savings but re-renders pages as images.
Does Safe mode keep selectable text?
Yes — it preserves the original text layer, form fields and links where the PDF's structure allows. Strong Compression does not; pages become images.
What if the file is already heavily compressed?
Text-only or already-optimised PDFs will see minimal reduction regardless of the slider. Strong mode helps the most when the PDF contains high-resolution images. There is a floor below which further compression makes the output unusable; the slider already stays above that floor.
Encrypted PDFs?
Not supported. Please unlock the file in a desktop tool first.
Good situations for this tool
- An email or upload form is rejecting your file for being too large.
- You are archiving scanned documents and want to save disk space.
- A portfolio or report needs to load quickly when shared online.
- A government or bank portal has a strict file-size cap.