What is the best free PDF compressor?

PDFJolt is the best free PDF compressor for privacy — it compresses files in your browser with no uploads. PDF24 offers unlimited free compression (server-side). iLovePDF has the best compression ratios at the cheapest Pro price ($7/mo).

How much can I compress a PDF?

Most tools reduce PDF size by 50-80% depending on the content. PDFs with high-resolution images compress the most. Text-heavy PDFs may only reduce by 10-30%. All tools listed offer quality settings to balance size vs. quality.

Does compressing a PDF reduce quality?

It depends on compression level. Light compression preserves quality while reducing size moderately. Aggressive compression can degrade image quality. Most tools offer quality presets so you can choose the right balance.

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7 Best Free PDF Compressors in 2026

Last updated: February 2026

The best free PDF compressors in 2026 are PDFJolt, iLovePDF, Smallpdf, Adobe Acrobat Online, PDF24, PDF2Go, and Soda PDF. PDFJolt compresses PDFs entirely in your browser for maximum privacy. iLovePDF offers the cheapest Pro plan, while PDF24 is completely free with no daily limits.

How We Tested

We compressed 8 PDF files (1MB to 50MB) with each tool using default settings. We measured compression ratio, output quality, processing speed, and checked if image quality and text remained intact. All tools were tested in February 2026.

PDFJolt

Our Pick

Best for: Privacy-first compression

Free (2 ops/day) · Pro $9/mo

Pros

Client-side — files never uploaded
No account needed
Multiple compression levels
Additional PDF tools included

Cons

10MB limit on free tier
No desktop app
Newer platform

Try PDFJolt Free

iLovePDF

Best for: Budget compression

Free (limited) · Premium $7/mo

Pros

Strong compression ratios
Three quality levels
Desktop app
Cheapest Pro plan

Cons

Server-side processing
Ads on free tier
Limited free operations

Visit iLovePDF

Smallpdf

Best for: Best UX for compression

Free (2 tasks/day) · Pro $12/mo

Pros

Clean interface
Good compression
Before/after preview
Desktop apps

Cons

Server-side processing
Only 2 free tasks
Account required

Visit Smallpdf

Adobe Acrobat Online

Best for: Adobe ecosystem users

Free (limited) · Acrobat Pro $22.99/mo

Pros

Trusted brand
Good quality output
Three compression levels

Cons

Very limited free usage
Most expensive option
Requires Adobe account

Visit Adobe Acrobat Online

PDF24

Best for: Unlimited free compression

Free (no premium tier)

Pros

100% free
No daily limits
Multiple quality levels
Desktop app (Windows)

Cons

Server-side processing
Windows-only desktop
Dated interface

Visit PDF24

PDF2Go

Best for: Large file compression

Free (limited) · Premium $8.50/mo

Pros

Supports large files
Multiple presets
URL upload

Cons

Server-side processing
Ads
Slower processing
Inconsistent results

Visit PDF2Go

Soda PDF

Best for: Desktop + online combo

Free (limited) · Standard $4.15/mo

Pros

Both desktop and online
Simple interface
Affordable Pro

Cons

Server-side processing
Aggressive upselling
Basic free tier
Variable compression quality

Visit Soda PDF

Comparison Table

Feature	PDFJolt	iLovePDF	Smallpdf	Adobe Acrobat Online	PDF24	PDF2Go	Soda PDF
Price	Free / $9/mo	Free / $7/mo	Free / $12/mo	Free / $22.99/mo	Free	Free / $8.50/mo	Free / $4.15/mo
Free Limit	2/day	Limited	2/day	1/day	Unlimited	Limited	Limited
Max Size (Free)	10MB	15MB	5MB	2MB	No limit	50MB	10MB
Client-Side
Compression	Good	Excellent	Good	Good	Good	Fair	Fair
Quality Settings
Batch Compress	Pro	Premium	Pro	Pro		Premium	Paid

Frequently Asked Questions

The Verdict

PDFJolt is the best free PDF compressor for users who want privacy — your files never leave your browser. PDF24 is uniquely unlimited and free. iLovePDF offers the best compression ratios at the lowest Pro price. Choose PDFJolt for privacy, PDF24 for no-limit free usage, or iLovePDF for the strongest compression.

Explore PDFJolt tools: Merge PDF · Compress PDF · PDF to Word · Sign PDF