OpenNestConvert anything. Your files never leave your device.
Every conversion runs entirely in your browser — images, Excel, PDF, documents,
spreadsheets, contacts, calendars, data, audio and more.
No uploads. No servers. No tracking.
Choose files
or drag & drop here
100% local — your file never leaves this device.
Why OpenNest?
The privacy-first file converter.
100% local
Every conversion happens in your browser — zero bytes leave your device. No upload, ever.
Nothing stored
We have no servers and no accounts. There is nowhere for your data to go.
Private by design
No uploads, no cookies, no tracking, no logs. It's just you and your files.
Works offline
Because everything runs on your device, conversion works even without a connection.
Zero footprint
Nothing is installed, nothing is remembered. Close the tab and every trace is gone.
Always free
No paywalls, no signups, no limits. Convert as much as you need.
How it works
Three steps. Nothing leaves your device.
Choose
Pick files
Select one file or many. We identify every format instantly.
Choose format
Pick your output
We show every format your file can become — from images and Excel to PDFs and audio.
Convert
Convert & download
Everything is processed on your device, then you download the result.
Your files never leave your browser.
What can I convert?
Dozens of formats, hundreds of conversions — all in your browser.
Images
Data
Text
Documents
Audio
Video
Encode & Compress
Spreadsheets
More formats are being added.
Your files stay yours
Privacy isn't a feature — it's the entire product.
Nothing leaves your device
Every conversion runs in your browser. No file is uploaded to a server, not even briefly, and nothing is logged.
No accounts, no tracking
Nothing to sign up for, nothing to track. No cookies, no analytics — we never see your content.
Zero traces, yours to control
Files are never stored. Close the tab and every trace is gone — even sensitive documents stay only with you, online or offline.