Image converters · OnDevice
Convert TIFF scans to JPEG or lossless PNG in a batch, without uploading
Open a TIFF scan or a stack of them and export JPEG or a lossless PNG. Multi-page TIFFs export each page separately. Decoding runs in a Web Worker on this device, so a batch can stay on your computer.
No upload. Files never leave your device.
Drop TIFF files here
Accepts .tif and .tiff files, including multi-page scans. Multiple files are fine; download a ZIP when the batch is done.
Results
No files yet. Nothing is sent to a server when you add them.
Lossless exports and batches of scans
Scanners and some cameras still write TIFF, often as a high-quality or multi-page file that is awkward to attach or to open in a casual viewer. Use PNG when you want a lossless copy of what the decoder read — useful for documents and line art. Use JPEG when you need a smaller photo-style file. Add a whole folder of TIFFs, convert once, and download a ZIP; multi-page scans come out as one image per page.
Frequently asked questions
Does this upload my scans?
No. Files are read in the browser and processed on your device. There is no conversion server.
Can I keep a lossless copy?
Yes. Choose PNG to keep the pixels the decoder produces, which is a better match for documents, line art, and archival scans than a lossy JPEG. JPEG is available when you need a smaller, more widely compatible photo-style file; use the quality slider in that case.
Can I convert a batch, or a multi-page TIFF?
Yes. Add several TIFF files and convert them together, then download a ZIP. Each page of a multi-page TIFF is exported as its own JPEG or PNG (up to 24 pages per file).
Will unusual TIFF files fail?
Very unusual TIFF compressions may fail. If that happens, try exporting the scan as a simpler TIFF first, then drop it here again.
Is there a file size limit?
Files larger than 40 MB are refused because they have to fit in your browser’s memory.
Which license covers the decoder?
Most browsers cannot read TIFF themselves, so this page uses UTIF.js (MIT), with pako (MIT and zlib) for compressed streams. Details are on the licenses page at https://useondevice.cc/licenses.