100% Client-Side Processing

Your Files Are Yours Not the Cloud

Compress images, merge PDFs, extract audio from video, edit photos and 30+ more, all free, online, 100% in your browser. No upload, no sign-up, no watermark.
No Limits No Tracking No Cost
Image PDF Video Audio
Explore 41+ Free Online Tools → How it works
Offline Ready
No Install
Private by Design
  • 41+ Tools
  • 100% Local Processing
  • 0 Files Uploaded
  • 0€ Sign-up Required
  • 3 Languages
The Difference

Built Different from Every Other Tool

Most online tools upload your files to a server. We chose the harder, more honest path: every operation runs inside your browser via WebAssembly. Verifiable, auditable, no exceptions.

DuneTools

Local-first by design

  • Files never leave your device
  • WebAssembly engines (mozjpeg, oxipng, ffmpeg, pdf-lib)
  • Works offline after first load
  • No sign-up, no email, no quota
  • No watermarks on output
  • Verifiable in DevTools, zero outgoing requests
Typical online tool

Server-side processing

  • Uploads your file to their server
  • "Files deleted in 24h", but unauditable
  • Requires constant network connection
  • Daily quotas, account walls, paid tiers
  • Output watermarked unless you upgrade
  • Privacy is a marketing claim, not a verifiable fact

Don't take our word for it, open DevTools → Network tab while using any tool. Zero outgoing payloads. The proof is structural, not promised.

Pro Toolkit

Pro Power. Zero Compromise.

41+ professional grade tools running at the speed of your hardware. 100% private, 100% free.

Pro Image Toolkit

Resize, Compress, and Convert images instantly. Studio-grade optimization powered by your local hardware.

16 TOOLS

PDF Master

Merge, Edit, and Compress Locally. Secure handling for your most sensitive professional documents.

12 TOOLS

Video & GIF Core

Private High-Speed Conversion. High-performance processing that stays on your device. Never shared.

5 TOOLS

Audio Studio

Local editing and noise reduction without quality loss. 100% private.

5 TOOLS
Real Performance

Stop the Wait.

Why upload files to the cloud for editing? Compare the actual technical speed.

DuneTools Edge

Local Processing

  • Upload Time 0 Seconds (Instant)
  • Data Privacy 100% Private (Local)
  • WiFi Dependency Zero (Offline)
Legacy Systems

The Cloud Mode

  • Upload Time (10MB) 2-8 Seconds
  • Data Privacy Server Risk
  • WiFi Dependency Constant Sync
Privacy First

Your Privacy Absolute.

Don't just trust, verify. We process everything in your browser so your files never leave your system.

01

Select Pro Tool

Pick from our suite of PDF, Image, or Video tools. Everything loads instantly.

02

Drop Files

Drag and drop your content. Processing begins instantly on your local device.

03

Instant Export

Get results without wait times. Your data never leaves your system.

Enterprise Ready

Compliance Absolute.

GDPR compliance by design. No third-party data contracts needed because your files never leave your control.

Lawyers Doctors Banking Government
Total Anonymity

We are invisible to your data.

We don't know who you are, and we don't want to. Zero cookies, no tracking, no account required.

Live Audit Mode

Verify Privacy Yourself

We are transparent: we challenge you to inspect our network and verify that your files never leave your device.

01

Inspect

Press F12 to open developer tools.

02

Filter Network

Go to the Network tab to see all traffic.

03

Audit

Process a file: 0 outgoing requests.

Browse Everything

Find the Right Tool

Format conversions, size targets, dev utilities and in-depth guides, everything DuneTools offers, organised so you can find exactly what you need.

Format Conversions

Quick Targets

New Tools

Guides

Frequently Asked

Any Doubts?

Everything you need to know about DuneTools.

Are my files really not uploaded to any server?
Correct. DuneTools uses WebAssembly technology to process all your files directly in your browser. You can verify this by disconnecting your Internet after loading the page - the tools will continue to work.
Why is it free if it's so good?
We believe that basic editing tools should be accessible to everyone. Our model is based on non-intrusive advertising, which allows us to offer all tools completely free without compromising quality.
What file formats are supported?
For images: JPG, PNG, WebP, GIF, HEIC, SVG, ICO. For documents: PDF. For video: MP4, WebM, MOV. For audio: MP3, WAV, OGG, AAC. Each tool specifies the supported formats.
Can I use DuneTools on mobile?
Yes, DuneTools is fully optimized for mobile devices. It works in any modern browser: Chrome, Firefox, Safari, Edge, both on desktop and mobile.
Is it necessary to create an account or sign up?
No. At DuneTools, we don't ask for emails, names, or credit cards. All tools are instantly accessible for free, removing any barrier between you and your work.
Can I edit legal contracts or sensitive documents?
Yes, it's the safest place to do so. Since there are no servers involved, your contracts, IDs, or invoices never leave your local control. No one, not even us, can see what you edit.
Do I need to install any software or plugin?
Absolutely not. DuneTools works directly in your modern browser. You get the power of professional desktop software without taking up disk space or requiring Admin permissions.
Is DuneTools GDPR compliant?
By design. Since we don't collect, process, or store any personal data on external servers, DuneTools exceeds GDPR standards. Your data stays in the most secure jurisdiction: your own device.