Compress PDF Online Free

Shrink oversized PDF files instantly. Set an exact target file size in KB or MB, or choose a quality ratio. No upload. No signup. Free forever.

Target Size KB/MB
Quality Ratio Mode
See Size Before & After
No File Limit
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Compress PDF Online Free
Compression Mode
Target Size
Ratio %
Upload a PDF to see its size
Target Size
🗜️ Drop or click to upload
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Upload a file to get started

How to Use Compress PDF Online Free

Follow these simple steps to get your result in under a minute — everything runs in your browser, no account required.

1
Upload Your PDF

Drag your PDF into the upload zone. FreePDFTools immediately shows your file's current size.

2
Choose Compression Mode

Select 'Target Size' to set a specific KB or MB goal, or 'Ratio %' to keep a percentage of the original quality.

3
Click Compress PDF

Processing happens instantly in your browser. No upload needed.

4
Download Compressed File

Click Download to save your smaller PDF. The size difference is shown in the success message.

Common Use Cases

Here are the most popular reasons people use this tool every day:

📧 Email AttachmentsCompress PDFs before emailing to stay under attachment limits — most email clients cap at 25MB.
📱 Mobile SharingShrink PDFs for faster sharing via WhatsApp, Telegram, or other messaging apps.
☁️ Cloud StorageReduce storage consumption in Google Drive, Dropbox, or OneDrive by compressing archived PDFs.
🌐 Web UploadsCompress PDFs before uploading to websites or portals that enforce file size limits.
📂 Bulk ArchivesCompress entire batches of old PDF reports to free up disk space on servers or hard drives.
🖨️ Print PrepReduce file size for PDFs being sent to commercial print services that have upload size restrictions.

Frequently Asked Questions

How much can FreePDFTools compress a PDF?▾
Typical compression reduces file size by 10–40% depending on the PDF's content. PDFs with many high-resolution images compress the most. Text-heavy PDFs may see smaller reductions.
Will compressing a PDF affect text quality?▾
No. FreePDFTools uses lossless compression via pdf-lib's object stream optimization. Text, vectors, and PDF structure are preserved exactly.
What is 'Target Size' mode?▾
You enter a desired file size (e.g. 500 KB or 2 MB). FreePDFTools calculates and applies the best compression to get close to that target.
What is 'Ratio %' mode?▾
You choose what percentage of the original quality to keep (e.g. 60%). FreePDFTools estimates the resulting file size before you process.
Can I compress a scanned PDF?▾
Yes. Scanned PDFs are image-heavy and typically compress the most. Results depend on the original scan resolution.
Is there a file size limit?▾
No hard limit — processing happens in your browser RAM. PDFs up to several hundred MB work fine on modern devices.

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