Upscale WEBP Images Online
Enlarge any WEBP image by 150, 200, 300 or 400 percent, or type a custom scale. Optional sharpening keeps edges from looking soft after enlarging.
How to Upscale a WEBP Image
Drop your images in, choose the magnification, then upscale and download. Processing runs in your browser, so files never leave your device.
Step 1
Upload your WEBP images
Drop one or more files into the box, or browse. Images up to 20 MB each are accepted.
Step 2
Pick a scale factor
Choose 150, 200, 300 or 400 percent, or type a custom value and watch the preview multiplier.
Step 3
Choose WEBP and download
Set Output Format to WEBP, keep sharpening on if you like, then upscale and save.
Why Enlarge WEBP Files in Your Browser Rather Than an App
Sooner or later an image arrives too small: a logo pulled from a chat message, a thumbnail that has to fill a hero slot, an old export locked at 600 pixels, a screenshot that is unreadable once it is placed on a slide. Enlarging it is the only option, and the way that enlargement is done decides whether the result looks acceptable or obviously stretched. This upscaler does the job in the browser with a stepped smoothing pass and an optional sharpening stage, and hands you a WEBP file at the end.
Being honest about what that means matters more than any marketing phrase. Enlarging spreads the pixels the image already has over a larger grid; it cannot recover detail that was never captured. What a good enlargement can do is avoid the two failures that make upscaled images obvious: jagged stair-stepping along diagonal edges, and the blurry mush that appears when everything is simply interpolated once. Stepping the scaling and following it with a sharpening pass keeps type legible and outlines cleaner than a single jump to the final size.
Choosing the magnification is quick. Presets cover 150, 200, 300 and 400 percent, with 200 percent marked as the recommended default because it roughly doubles a picture without pushing the interpolation too far. When a layout needs an exact figure, the custom field accepts any percentage and shows the multiplier as you type, so filling a specific slot or matching a print dimension is straightforward. Images up to 20 MB each are accepted.
Output works the way the rest of the toolset does. The format selector starts on Keep Original, so set it to WEBP when you want the enlarged file in a compact web friendly format, and remember that the quality slider applies to WEBP and JPEG but is ignored for PNG, which is always lossless. Because enlarging re-encodes the picture, exporting once at high quality is kinder to it than repeatedly saving the same file.
Practical touches make it usable for real batches rather than one-off experiments. Several images can be loaded at once and every result collected in a single ZIP archive, which is what you want when a whole folder of product thumbnails has to be doubled. Everything runs locally: your images are decoded, scaled and encoded on your own machine, with no upload, no queue, no watermark and no account. If a result is not quite right, change the scale and run it again from the original file.
Four Quick Factors
Pick 150, 200, 300 or 400 percent, or enter any custom percentage you need for a layout.
Optional Sharpening
Enhance Detail applies a sharpening pass after scaling, which keeps text and edges from looking soft.
Batch Upscaling
Load several images at once and download every enlarged result together in one ZIP archive.
WEBP Output
Select WEBP as the output format to keep enlarged images in a compact, web friendly format.
Quality Control
A quality slider from 10 to 100 governs WEBP and JPEG output, with PNG written losslessly.
Runs Locally
Enlarging happens in your browser, so originals are never uploaded to an external server.
FAQ
Frequently Asked Questions
No. Enlarging spreads the pixels the picture already contains across a bigger grid, so detail that was never captured cannot come back. Good scaling avoids jagged edges and blur instead of inventing detail.
Start with the recommended 200 percent, which roughly doubles an image without pushing interpolation too far. Use 300 or 400 percent only when the source is already reasonably sharp and clean.
Yes. Choose Customize and type any percentage you need; the field shows the resulting multiplier beside it, which helps when you are matching a fixed layout width or print dimension.
Only if you select it. Output Format defaults to Keep Original, so pick WEBP before upscaling when you want the larger image encoded as WEBP at your chosen quality level.
Softness comes from spreading limited pixels over a larger area. Leave the Enhance Detail checkbox ticked to run the sharpening pass, and start from the highest resolution source you have.
Each file can be up to 20 MB. Very large enlargements also need plenty of memory in the browser, so going beyond 400 percent on a huge source may feel slow.
Yes. Load as many images as you like in one go, and use Download All to collect every enlarged result into a single ZIP archive instead of saving them one by one.
It applies to WEBP and JPEG output, where the default setting of 92 keeps quality high. PNG output ignores the slider entirely because PNG encoding is always lossless either way.
No. Decoding, scaling, sharpening and encoding all happen inside your own browser tab, so nothing is sent to a server, stored on disk or analysed, and no account is ever required.
Yes. Transparency survives the enlargement when you export to WEBP or PNG. Choosing JPEG flattens the transparent areas onto a solid colour instead, because JPEG cannot store an alpha channel.