Free Image Upscaler 2x-4x
Upscale an image by 2×, 3× or 4× using high-quality browser resampling, with an optional sharpening pass and a before/after preview. It makes images bigger and can look crisper, though it can’t recover detail that was never in the original. Everything runs on your device — nothing is uploaded.
- 100% free
- Private & safe
- Runs in your browser
Your files are processed securely in your browser and are not uploaded to our servers.
Why use Image Upscaler (2×–4×)?
Image Upscaler (2×–4×) lets you edit and optimise images in seconds, right in your browser — no bulky software to install and nothing uploaded to a server.
- 100% private: files are processed in your browser and never uploaded.
- Completely free, with no account, no watermarks and no usage limits.
- Handles Input/Output: JPEG, PNG, WebP; Scale: 2×, 3×, 4× (high-quality resampling).
- Add a JPEG, PNG or WebP image.
- Works on any device — desktop, tablet and phone — and is fully keyboard accessible.
What it can do — and its limits
- Upscales 2×–4× with high-quality resampling; runs fully in the browser.
- Optional sharpening to counter the softness of upscaling.
- Side-by-side before/after preview.
How to use Image Upscaler (2×–4×)
- Add a JPEG, PNG or WebP image.
- Choose a scale factor (2×, 3× or 4×) and a sharpening amount.
- Enlarge and compare the before/after preview.
- Download the enlarged image.
Examples
- Enlarging a small avatar to 2× for a banner.
- Scaling a logo up for print at 4×.
Supported formats & limits
- Input/Output: JPEG, PNG, WebP
- Scale: 2×, 3×, 4× (high-quality resampling)
Limitations
- Resampling smooths but cannot recover detail that was never captured — it is not AI super-resolution.
- Very large outputs are limited by device memory.
- Best on graphics and modest enlargements; heavily upscaled photos look soft.
Frequently asked questions
What does the sharpen control do?
Upscaling an image softens edges. The sharpen pass applies a light convolution to make edges crisper again. Keep it moderate — too much sharpening looks grainy.
Will it improve a blurry photo?
It can make a small image larger and slightly crisper, but it cannot recover detail that was never captured, so a blurry source stays fundamentally blurry.
Which formats are supported?
JPEG, PNG and WebP. The upscaled image is saved in the same format you uploaded.
Are my images uploaded?
No. Upscaling happens entirely in your browser; your image never leaves your device.