PDFLight
PDFLight is a free desktop application from DALIM for compressing PDF files on Windows and macOS.
What PDFLight is
PDFLight is a free desktop application from DALIM for compressing PDF files on Windows and macOS. It can reduce file sizes by up to 98%, helping with large-document sharing, email attachment limits, and storage use. DALIM says compression preserves text clarity, image quality, and layout integrity. Users optimize files by dragging them into the app and making a few selections. PDFs are processed locally on the device rather than uploaded to third-party servers, and the application works offline. The free plan includes core compression features. DALIM identifies students and educators, designers and marketers, print and packaging teams, and business users handling large documents as suitable users. Enhanced collaboration and greater control are available through an upgrade. PDFLight focuses on compression, while DALIM’s broader platform covers automation, file transformation, and enterprise workflows. The Free plan costs nothing and supports Windows and macOS.
Good
- Reduces PDF size by up to 98%
- Local processing protects uploaded-file privacy
- Works offline on Windows and macOS
- Drag-and-drop optimization
- Free core compression features
Watch out
- Free version has core features only
- Enhanced collaboration requires an upgrade
- Focused on compression rather than broader workflows
Who it suits
PDFLight suits people and teams who need local, offline PDF compression. Its listed audiences include students, educators, designers, marketers, print teams, packaging teams, and business users with large documents.
Verdict
PDFLight is a free, offline compressor for Windows and macOS that keeps processing on the user’s device. It covers core size reduction, while collaboration and greater control are reserved for an upgrade.
Plans and prices
From PDFLight's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | Core PDF compression features · Windows and macOS |
The facts
Each one read from PDFLight's own pages, with the date it was checked.
The company
- Company history
- DALIM says it was founded in 1985 in Strasbourg, France.checked 9 Oct 2026
- Founded
- 1985checked 28 Sep 2026
- Headquarters
- Kehl, Germanychecked 28 Sep 2026
- Team use
- DALIM says PDFLight helps individuals and teams share files faster, avoid email size limits, and reduce storage overhead.checked 9 Oct 2026
What it does
- Ease of use
- Users can optimize PDFs with drag and drop and a few clicks.checked 9 Oct 2026
- Intended users
- DALIM identifies students and educators, designers and marketers, print and packaging teams, and business users handling large documents as suitable users.checked 9 Oct 2026
- Limits
- The free version includes core compression features; DALIM describes enhanced collaboration and greater control as available through an upgrade.checked 9 Oct 2026
- Privacy
- PDF files are processed locally on the user’s device and are not uploaded to third-party servers.checked 9 Oct 2026
- Purpose
- PDFLight is a desktop PDF compression tool that reduces file sizes by up to 98%.checked 9 Oct 2026
- Quality
- DALIM says PDFLight preserves text clarity, image quality, and layout integrity while compressing PDFs.checked 9 Oct 2026
- Related products
- DALIM describes its broader platform as offering advanced automation, file transformation, and enterprise workflows beyond PDFLight’s compression.checked 9 Oct 2026
Where it runs
- Platforms
- PDFLight is available for Windows and macOS.checked 9 Oct 2026
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