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Convertto

Image Upscaler — Enlarge to Any Size

Drop an image, see its current size auto-detected, set your target width, height or file size and enlarge.

Drop an image and the tool auto-detects its width, height and file size, pre-filling the targets at 2× the original. Edit the target width, height or file size to upscale. If the result at target dimensions is still smaller than your file-size target, the tool scales further automatically. Interpolation ranges from smooth for photos to nearest-neighbour for pixel art.

Runs in your browser
Auto-detect
Fills targets at 2× the original on drop
Interpolation
High, medium, low, or nearest-neighbour for pixel art
Target size
Scales further if the result is under your file-size target
Privacy
Runs entirely in your browser — nothing is uploaded
Cost
Free, unlimited, no sign-up

Frequently asked questions

Will upscaling improve image quality?

Upscaling adds pixels by interpolation — it makes the image larger but cannot recover detail that was never captured. Photographs will look slightly softer at extreme scales. For pixel art, use nearest-neighbour to keep sharp edges.

What is nearest-neighbour interpolation?

It duplicates pixels without blending, preserving the sharp, blocky look of pixel art, retro game sprites, and low-resolution icons. Photographs should use high-quality (smooth) interpolation instead.

How to use the image upscaler

  1. 1Select your images — the file stays on your device and is never uploaded.
  2. 2Set the target width.
  3. 3Set the target height.
  4. 4Set the target file size.
  5. 5Set the quality.
  6. 6Choose the interpolation.
  7. 7Choose the output format.
  8. 8Pick the background.
  9. 9Press Run, then download the result when it is ready.

Embed this tool

Put the working image upscaler on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.

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