Compress PDF
Reduce the size of your PDF files online without losing readability. Fast, secure, and free.
Drag & Drop your PDFs here or
Lower quality = smaller size (current: 0.6)
Compress PDF — Fast, Private, and Reliable
Compress large PDF files to a smaller, shareable size without sacrificing readability. This tool is fully browser‑based, so your files never leave your device—perfect for email attachments, online submissions, or faster storage and sharing.
Why use Compress PDF?
- Easier sharing and uploads: Smaller PDFs meet email/portal limits and upload faster.
- Save storage and bandwidth: Keep archives lightweight and speed up downloads.
- Keep readability intact: Images are optimized and metadata cleaned; text/layout preserved.
- Private and secure: 100% in‑browser processing—no server uploads or storage.
How it works (simple)
- Image optimization: Resamples & recompresses embedded images efficiently.
- Metadata cleanup: Removes unused objects, thumbnails, and extra metadata.
- Structure preservation: Keeps layout, fonts, links, and vectors whenever possible.
How to use
- Drag & drop your PDF files or click to upload from your device.
- Choose a quality level with the slider (lower = smaller size).
- The tool rebuilds a compact, optimized PDF in your browser.
- Click Download to save the compressed file.
Tips for best results
- Start with “Medium” quality, then lower if you need a smaller file.
- For scanned PDFs, try grayscale to reduce size further.
- If the original is already optimized, remove unused pages/images first.
- Avoid re‑compressing the same PDF repeatedly—use the original source.
- If text looks blurry, slightly increase the quality and re‑export.
Common use cases
- Emailing documents with strict attachment limits.
- Submitting resumes, assignments, proposals, or reports to portals.
- Archiving to save space on cloud drives or shared folders.
- Publishing manuals/handbooks for faster downloads.
Troubleshooting
- Output still large: Original may be optimized or mostly text—lower quality or remove images/pages.
- Text looks fuzzy: Increase quality; ensure the source has selectable text (not only scans).
- Very large files fail: Split into parts, compress separately, then merge.
- Password‑protected PDFs: Remove the password first, then compress.
Compress PDF — FAQ
Is this PDF compressor safe to use?
Yes. It runs entirely in your browser; files are never uploaded or stored.
Will the text in my PDF stay searchable?
If your original has selectable text, it typically remains readable. Scanned PDFs are image‑based; use OCR to make them searchable.
What’s the difference between quality levels?
Lower quality = stronger image compression and downsampling (smaller file, softer images).
Higher quality = more detail, larger size.
Does this change my page size or layout?
No. It optimizes assets while preserving page size, layout, fonts and reading order whenever possible.
Can I compress multiple PDFs at once?
Yes. Drop/select multiple files; each will appear with a separate Download button.
Is there a maximum file size?
Depends on device/browser memory. For huge files, split first, compress, then merge.
Lossy vs. lossless compression?
Lossy gives big savings by reducing image detail. Lossless removes overhead/metadata only (smaller savings).