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Compress PDF Online

Compress PDF and reduce file size with Lossless clean, Balanced or Maximum quality, or auto-tune to a Target Size. Works on mobile; private by design.

Why compress PDF online free with PDF Juggler

Use our browser-based compressor to reduce PDF file size on desktop or mobile without installing software.

Works in every browser

Works instantly in Chrome, Safari, Firefox, and Edge across Windows, macOS, Linux, Android, and iOS.

Keeps PDFs lean and clear

Streamlines fonts, metadata, and internal structure so downloads stay lean while pages stay clear.

Real-world PDF compression results

See how PDF Juggler shrinks different documents compared with the upload-first services most people try.

Vector-heavy annual report (32 MB original)

PDF Juggler result
Lossless clean → 27.6 MB with every vector and font preserved.
Typical online tools
Cloud compressors barely reduce size or rasterize pages to hit targets.

Scanned contract bundle (58 MB original)

PDF Juggler result
Balanced mode → 8.4 MB (85% smaller) while signatures stay legible.
Typical online tools
Uploads typically return 14–18 MB downloads with softer text.

Image-heavy product catalog (164 MB original)

PDF Juggler result
Maximum mode → 22.9 MB (86% smaller) ready for fast sharing.
Typical online tools
Aggressive presets blur product labels or watermark the export.

Client brochure for e-filing (45 MB original)

PDF Juggler result
Target Size 8 MB → 7.9 MB result that meets strict upload limits.
Typical online tools
Fixed presets overshoot limits, forcing repeat compressions.

Compress PDF online free to hit delivery requirements and improve reader experience.

Use cases for smaller PDFs

How it works

  1. Click “Select PDF” or drag & drop your file.

  2. Select Lossless/Balanced/Maximum or set a Target Size (e.g., ≤ 5 MB).

  3. Click “Compress PDF” and download the result.

Guides & tutorials

Frequently asked questions

What’s the difference between the levels?

Lossless cleans structure and metadata without visual changes. Balanced/Maximum render pages to optimized JPEGs. Target Size auto-tunes DPI, JPEG quality, and pixel caps to reach your chosen size.

Is my file private?

Balanced/Maximum and Target Size compression run in your browser. Lossless uses our server only to clean structure; files are not stored.

Does it work on mobile?

Yes. The interface is touch-friendly with large tap targets and responsive previews.

How fast can it reduce PDF size?

Compression runs entirely in your browser and streams pages. In our latest benchmark, shrinking a 200 MB, 450-page annual report with Balanced mode on an M2 MacBook Air finished in about 32 seconds; older laptops or phones may take closer to a minute because the work relies on your CPU.

Will compression affect quality?

Lossless keeps original vectors and text untouched. Balanced/Maximum rebuild pages as images and may soften fine details slightly, especially at the most aggressive settings.

How to compress PDFs for email under 25 MB?

Choose Target Size and set 25 MB (or lower). We’ll automatically dial back DPI and JPEG quality until the export stays under the limit.

Can I batch compress multiple PDFs?

Compression handles one PDF at a time today. Zip a batch to upload once, queue the next file as soon as the first finishes, or combine everything with Merge PDF (/tools/merge-pdf) before running a single compression pass. Join the multi-file beta via the contact form to get early access.

What about scanned documents?

Scanned PDFs benefit most from Balanced or Maximum modes, which rebuild pages with optimized JPEGs. Use Target Size if you need to hit a specific cap without sacrificing too much legibility.

Are there file size/page limits?

There are no enforced limits. Extremely large PDFs (hundreds of megabytes or thousands of pages) may take longer, but the tool will stream pages until the job is done.

Do you have real examples of PDF compression savings?

Yes. Our comparison table highlights sample files with their original size, compressed result, and the mode we used—Lossless clean-up, Balanced, Maximum, or Target Size. It shows when to compress scanned PDF archives or compress PDF for email attachments.