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100% Free
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PDF Compressor
Shrink PDF file size without losing readability.
Drop a PDF here or click to upload
Max 50.00 MB · Real compression — typically saves 40–80%
How to Use PDF Compressor
- 1📁
Upload your PDF file
- 2⚙️
Choose your compression level
- 3🗜️
Click Compress to shrink the file
- 4⬇️
Download the smaller PDF instantly
Why Use FlikTools PDF Compressor?
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Privacy First
Files processed in browser, never uploaded.
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Instant Results
No waiting, no queue, works in seconds.
Frequently Asked Questions
Complete Guide: PDF Compressor
What is PDF Compressor?
FlikTools PDF Compressor is a free, browser-based tool that reduces the file size of any PDF without destroying its readability. It works directly in your browser, which means your documents are never uploaded to a remote server — compression happens locally on your device.
Most PDFs are bloated with high-resolution images, embedded fonts, and metadata you don't need to share. The compressor re-encodes images, strips unused objects, and rewrites the file structure so the same content fits into a much smaller file. Typical results range from 20% to 70% size reduction depending on the original.
It's built for anyone who needs to email a PDF, upload it to a portal with a strict size limit, attach it to a job application, or simply save storage space — students, freelancers, lawyers, recruiters, and small business owners all use it daily.
When Should You Use PDF Compressor?
- Email size limits. Gmail, Outlook, and most corporate inboxes block attachments over 25 MB. Compress your PDF first to send it without splitting.
- Government or legal portals. Tax filings, visa applications, and court submissions often cap uploads at 2–5 MB per document.
- Job applications. Recruiter ATS systems prefer compact resumes and portfolios that load instantly on any device.
- Sharing scanned documents. Scans from phones or printers are often massive — compression makes them practical to share over WhatsApp or Slack.
- Archiving large reports. Reduce hundreds of internal PDFs to free up Drive, Dropbox, or local storage space.
PDF Compressor vs Other Tools
Compared to desktop apps like Adobe Acrobat Pro, FlikTools is free, requires no install, and works on any device — phone, tablet, Chromebook, or PC. Compared to other online compressors, your files never leave your browser, so there's no privacy risk and no upload wait time.
We don't watermark output, don't cap the number of files per day, and don't ask you to sign up. If you need the smallest possible file at zero cost without handing your documents to a third party, this is the most practical free PDF compressor online.
Tips for Best Results
- Pick the right level. Use Medium for most documents. Switch to High only when the PDF is image-heavy and you're okay with slightly softer images.
- Compress scans before sharing. Phone scans often double in size unnecessarily — running them through compression once before sending is almost always worth it.
- Combine with Split PDF. If a single section of a long PDF is what's bloating it, split first, compress that section, then merge.
- Re-export instead of re-compressing. Compressing an already-compressed PDF gives diminishing returns. Re-export from the source if possible.