Tiny Online Tools
Compress PDF Online — Free, Private & Instant
Large PDF files can be a hassle to share by email, store in the cloud, or upload to a web form. Our free online PDF compressor reduces the file size of any PDF directly in your browser — no uploads, no account needed, and your documents never leave your device.
How to Compress a PDF
- Select your PDF file — click to browse or drag and drop the file into the picker.
- Choose a compression quality — pick from Low, Medium, or High quality to balance file size and visual fidelity.
- Click Compress PDF — the tool processes the file instantly in your browser.
- Download the result — see the exact file size reduction and download the compressed PDF with one click.
Compression Quality Options
- High quality — minimal quality loss, moderate size reduction. Best for documents with fine text or detailed graphics.
- Medium quality — a good balance of visual quality and file size savings. Ideal for most use cases.
- Low quality — maximum size reduction, some visible quality reduction. Useful for large files that just need to fit in an email attachment.
Why Use This Tool?
- 100% client-side — all compression happens locally in your browser using canvas-based JPEG re-rendering. No file is ever transmitted to a server.
- Instant results — see your file size savings immediately after compression without waiting.
- No limits — compress PDFs of any size, as many times as you need, completely free.
- Works everywhere — compatible with all modern browsers on desktop and mobile.
Common Use Cases
- Email attachments — many email providers limit attachments to 10–25 MB; compress your PDF to fit within those limits.
- Web uploads — reduce PDFs for upload forms that have file size restrictions.
- Cloud storage — shrink large PDF archives to save storage space.
- Faster sharing — smaller files upload and download faster, especially on mobile connections.
- Printing workflows — reduce file size before sending to a print service while keeping acceptable quality.