Free tools

Free microscopy image tools

Open, inspect and convert microscope and whole-slide images in your browser, add a scale bar, and work out magnification, pixel size or cell counts. Every tool runs on your computer: files are never uploaded.

Open a TIFF All tools

Tools

Online TIFF viewer16-bit, multichannel, multi-page, OME-TIFF and pyramidal TIFF in your browser
TIFF metadata viewerEvery tag, OME-XML, ImageJ and SVS metadata, pixel size and identifying fields
SVS viewer onlineAperio whole-slide images with label, macro and MPP, zoomable in your browser
OME-TIFF viewerChannels, Z and time from the OME-XML, with contrast per channel
TIFF to JPG/PNG converter16-bit, multichannel and multi-page TIFFs to PNG or JPEG, with contrast you set
Add a scale barA calibrated scale bar on a PNG or JPEG micrograph
Microscopy calculatorsMagnification, field of view, resolution, pixel size, hemocytometer, seeding

When to use a desktop app instead

JPEG 2000 SVS (Aperio compression 33003/33005), JPEG XR and JPEG XL cannot be decoded in a browser without WebAssembly, which this page does not load.
Not TIFF-based: CZI, ND2, LIF, MRXS, VSI, IMS, OIB/OIR and DICOM need a desktop reader. NDPI is TIFF-like but stores each level as one huge JPEG, too large for a browser tab.
OME-TIFF with several series shows the first series.
No measurements, annotations or analysis: it is a viewer.

For those formats, and for measuring, annotating and counting cells on your own images, SlideScope opens 34 microscope and slide-scanner formats on Windows and Mac. SlideScope, the desktop microscopy app made by the same team, is a paid app with a free preview. Free alternatives: Fiji (Bio-Formats) and QuPath.

Questions

Are these tools free?

Yes. They are free, need no account and run in your browser. SlideScope, the desktop microscopy app made by the same team, is a paid app with a free preview.

Are my images uploaded?

No. Each tool reads the file on your computer and works inside the page; nothing is sent to a server.

Which files do the viewers open?

TIFF and BigTIFF (8- to 32-bit), OME-TIFF, ImageJ TIFF, pyramidal TIFF and Aperio SVS with JPEG compression. CZI, ND2, LIF, MRXS, NDPI and JPEG 2000 SVS need a desktop reader.

Do they work on a phone?

Yes, in any current browser, though large slides are easier to explore on a computer.

Need more than a browser can do?

SlideScope opens 34 microscope and slide-scanner formats on Windows and Mac, CZI, ND2, LIF, MRXS and JPEG 2000 SVS among them, with measuring, annotations, cell counting and full-resolution OME-TIFF export. Try it on your own images with the free preview. Already decided? Subscribe now.

Download SlideScope