How to use Large Image Viewer
A local single image must be decoded by the browser and can use far more memory than its compressed size. It is not a DZI/IIIF tile service.
- Choose one high-resolution image.
- Wait for decoding and inspect width, height, format, and estimated memory.
- Zoom, pan, and use the navigator to locate details.
- Stop after a memory warning and use a tiled source instead.
What this tool helps with
- Inspect detail without an image editor
- Navigator for quick orientation
- Processing runs in this browser tab; the file is not uploaded to FreeTool to perform the task.
Compatibility and limitations
- Small compressed size does not mean small decoded memory
- Images beyond canvas, texture, or memory limits cannot open
- No tile generation, professional color management, or medical display
Frequently asked questions
Why does a 100 MB image use much more memory?
Decoded pixels commonly use width × height × four bytes or more, independent of compression size.
Can every TIFF open?
Only compression and bit-depth combinations supported by the current decoder; use specialist tools for multipage/scientific TIFF.
Is the image uploaded?
Processing runs in this browser tab; the file is not uploaded to FreeTool to perform the task.