AI Image Upscaler
Enlarge small images 2× or 4× with a super-resolution AI model
Click or drop an image hereChoose an image
JPG, PNG, WebP · up to 6 MP (e.g., 3000×2000)
Enlarge
AI model: 4xNomos2_hq_mosr by Philip Hofmann, licensed CC BY 4.0.
About AI Image Upscaler
AI Image Upscaler enlarges a JPG, PNG, or WebP image 2× or 4× with 4xNomos2_hq_mosr, a super-resolution neural network that predicts fine detail instead of only stretching pixels. Images up to 6 MP and 30 MB are accepted. If your browser offers WebGPU, the image has no transparency, and the result fits in the browser, the model runs on your device; otherwise the image goes to our own server. Either way you get a PNG and a before/after slider to compare. The page always says where the work was done.
How to upscale an image with AI
- 1Click the upload area and choose a JPG, PNG, or WebP image.
- 2Under "Enlarge", pick 2× or 4×; each button shows the size of the result.
- 3Click "Upscale image"; the page says whether it runs on your device or on our server and how long is left, and "Cancel" stops it.
- 4Drag the "Compare" slider to see before and after, then click "Download" to save the PNG.
Formats and limits
- Input formats
- JPG, PNG, WebP
- Maximum input
- 6 MP and 30 MB
- Output
- PNG, transparency kept, named after your image with -upscaled-2x or -upscaled-4x
- Where it runs
- On your device with WebGPU; on our server otherwise, for images with transparency, or when you choose it
- Usage limits
- None when it runs on your device; on our server, a number of jobs per connection per hour and per day, and the upscaler's own monthly budget
Where your image is processed
When your browser has WebGPU, the AI model is downloaded once and the image is enlarged in your browser; it is not uploaded. Otherwise, the image is uploaded to our server on Railway and enlarged by our own AI service, never a third party; large images are sent in parts. The image and the result are deleted from the service after your download completes, or when the job expires.
Frequently asked questions
Is my image uploaded?
No, not when it runs on your device: with WebGPU, no transparency, and a result your browser can hold, the image stays in the browser and the page says so. Otherwise yes: it goes to our own server, never a third party, and the page says that too.
How large can the image be?
6 MP, for example 3000×2000, and 30 MB. At 4× such an image becomes 96 MP. Larger photos are refused before any work starts; shrink them first with Resize Image.
Does 2× take less time than 4×?
No. The model always enlarges 4×, and the 2× result is the 4× result reduced by half, so both take about the same time. Choose 2× when you do not need the larger file.
Is transparency kept?
Yes. An image with transparent areas is always processed on our server, which enlarges the colors with the AI model and resizes the transparency layer with a standard filter, then joins both in the PNG.
Is the AI model openly licensed?
Yes. Philip Hofmann trained 4xNomos2_hq_mosr and published it under the Creative Commons Attribution 4.0 license; the page credits it under the tool. We chose it after comparing nine open models on the same photo.
Tips and tricks
- ✓The first run on your device downloads the AI model; later runs during the same visit start sooner.
- ✓On a slow graphics chip, accept the page's offer to switch to our server when it appears.