Convert, edit, and transform documents and images without uploading anything. Your files stay on your device — always. Built in Switzerland
Universal Converter
Cross-convert 20+ file types including documents, images, and spreadsheets. Fully offline.
→
Document Studio
Merge, split, rotate, reorder, watermark, compress, protect and OCR PDF & Word documents.
→
Image Engine
Resize, crop, compress, remove backgrounds and encrypt images. HEIC, JPG, PNG, WebP and more.
→
Encrypt & Lock
Password-protect any file — documents, images, audio, video, archives. Encrypt and decrypt entirely in your browser.
→
20+
formats supported
0
sign-ups required
100%
offline processing
∞
file size limit
Three steps. That's it.
No accounts, no uploads, no waiting. Just results.
📂
1
Drop your files
Drag files onto the tool, or click to browse. Any format, any size. Mix different file types in a single batch.
⚡
2
Choose your output
Select the format you need. Apply one setting to all files at once, or configure each file individually.
💾
3
Files save instantly
Processed files save directly to your device. Nothing leaves your browser. Close the tab and it's all gone.
Why local processing matters.
Your files are yours. We built this so they stay that way.
🔒
Your files never leave your device
No uploads to servers. No data in transit. When you drop a file into DocTools Pro, it stays in your browser's local memory — full stop.
⚡
Works without internet
Once the page loads, every conversion runs in your browser. Lose your connection mid-session and nothing breaks. No server to go down.
🗑️
Nothing stored, nothing logged
Close the tab and everything is gone. No processing history. No analytics on your files. Your browser's garbage collector handles the rest.
DocTools Pro vs. cloud converters.
The difference is where your files go.
Feature
Cloud converters
DocTools Pro
File privacy
✗ Files uploaded to servers
✓ Files never leave your device
File size limits
✗ Usually 10–25 MB max
✓ No limits — any size
Internet required
✗ Always required
✓ Only for first load
Tracking
✗ Analytics, retargeting
✓ Zero tracking, no analytics
Account required
✗ Usually required
✓ Never
Every format. No plugins.
20 file formats, fully supported. All processed locally.
PDFDocument
DOCXWord
ODTOpenDoc
PPTXPowerPoint
EPUBeBook
RTFRich Text
TXTPlain Text
HTMLWeb Page
JPGJPEG
PNGPortable
WebPModern
HEICApple
SVGVector
BMPBitmap
TIFFLossless
GIFAnimated
CSVComma Sep.
XLSXExcel
ODSOpenSheet
XLSExcel 97
🔒 100% local processing
📡 Zero uploads
🚫 Zero tracking
📶 Works offline
DocTools Pro is a free, all-in-one workspace for the document and image tasks people run into every day — combining PDF pages into one file, splitting a long document into smaller ones, shrinking files so they fit in an email, converting between dozens of formats, cleaning up photos, or adding a password to something private. Everything runs directly on your own computer or phone, so your files are never sent anywhere or stored on a server. There's nothing to install, no account to create, and no limit on how often you can use it — just open a tool and get to work.
Frequently Asked Questions
Is DocTools Pro really free?
Yes. Every tool is free to use with no account or subscription required.
Are my files uploaded anywhere?
No. All processing happens locally in your browser. Your files never leave your device.
Do I need to install anything?
No installation is required. DocTools Pro runs entirely in modern browsers like Chrome, Firefox, Edge and Safari.
Does DocTools Pro work on mobile devices?
Yes. Most tools work on phones and tablets, though larger files are easier to handle on a desktop or laptop.
Do I need an internet connection to use the tools?
You need a connection to load the page initially, but most tools keep working afterwards even if your connection drops.
Will my files be deleted automatically?
There is nothing to delete — your files are never sent anywhere, so nothing is stored on our end in the first place.