Image upscaler
Enlarge images with high-quality browser resampling up to four times.
A practical guide to Image upscaler
Image Upscaler enlarges a decoded image by 2×, 3×, or 4× with high-quality browser resampling and exports a PNG. The workflow is intended for presentation size and compatibility rather than machine-learning detail reconstruction.
Example: make a small diagram easier to place
Choose the clean source, select 2× first, create the PNG, and inspect thin lines and text at the size where the enlarged asset will actually be used.
Task-specific steps
- 1
Choose the original image and consider its current pixel dimensions, compression, text detail, and final placement.
- 2
Select a scale factor that stays within safe browser canvas limits and balances output size against practical memory use.
- 3
Create the PNG, inspect edges and fine details, and keep the original beside the enlarged copy for comparison.
Options that affect the result
- The scale selector offers 2×, 3×, and 4× output dimensions.
- High-quality smoothing prioritizes a cleaner presentation when the browser resamples the source pixels.
Limitations to know first
- Resampling cannot recreate texture, focus, or detail that the source never captured.
- Large source dimensions multiplied by the selected factor can exceed safe browser memory limits and must be processed at a smaller scale.
Questions specific to this task
Does 4× upscaling add real detail?
No. It creates more pixels through interpolation. The output can be easier to place or view, but it cannot recover information lost through blur or compression.
Why was my requested upscale rejected?
The resulting canvas would exceed the browser safety limit. Choose a smaller source, a lower scale, or resize the source before enlarging it.