What does Upscale Image do?
Upscale Image is a free online tool that can upscale image by a percentage factor using Lanczos filter. The PNG result from Upscale Image is a separate copy to inspect before you use it elsewhere. One possible use is small graphics enlarged for a draft composition.
Image upscaling enlarges a picture with a Lanczos resampling filter. The scale field is a percentage, with 200 meaning twice the width and height.
It can help a small asset fit a larger canvas, but it does not infer new authentic detail with an AI reconstruction model. Compare the enlarged image at its actual display size and keep the original so that further edits do not repeatedly resample the same pixels.
The scale field uses a percentage of the source size. A value of 200 makes each dimension twice as large.
The new pixels are estimated from nearby source pixels. This is not a recovery of original detail. Check the result at the intended viewing size, rather than only at a smaller preview.
Enlarge a picture with resampling online: steps
Before using Upscale Image, decide what the new copy must contain and where it will be used. Choose a scale percentage based on the target width and height and the resolution of the original. Review the upload area and all values required by the current Upscale Image form.
Choose the source
Inspect edges in an enlarged product picture. For Upscale Image, choose one source from your device. Keep a source copy for another attempt.
Review the form values
Scale % controls a value used by Upscale Image. The starting Scale % value is 200.
Run the file task
Use Process Upscale Image after checking the source and form values. Wait for the job to finish. An error means this attempt failed.
Save and check the output
Check fine textures, text edges and any halos that appear after interpolation. Store the output on your device. Name this copy separately from the original.
Enlarge image: uses for Upscale Image
Upscale Image can help with preview images fitted to a larger screen layout. It can also be used for owned illustrations tested before a presentation. The PNG result from Upscale Image must suit the intended reading or editing step, so keep the source until that check is complete.
- Small graphics enlarged for a draft composition.
- Preview images fitted to a larger screen layout.
- Owned illustrations tested before a presentation.
- Source resolution limits assessed at a target size.
Formats and limits for Upscale Image
The Upscale Image form accepts the image formats in the table sources. Each Upscale Image upload can be up to 300 MB, which equals 300 MiB. The allowed suffixes on the Upscale Image page do not prove that a source has valid content inside it.
| Accepted formats | Maximum file size | Output |
|---|---|---|
| JPG, JPEG, PNG, WEBP | 300 MB per file (300 MiB upload limit) | PNG |
Enlargement cannot restore information the source never contained. Large scale factors increase file size and may make pixelation or softness more visible.
Practical checks for Upscale Image
Decide how large the picture needs to appear. Check the required width and height. Then choose a scale for a test copy.
Twice the width also means twice the height. That creates four times as many pixels. The extra pixels are estimates, not newly captured detail.
Look at a sharp edge in the result. Check for soft lines or halos. Compare it with the source at the planned display size.
A bigger file is not always a better one. A small view can make both versions look alike. Use the size that the destination needs.
Keep the source for another scale choice. Avoid treating an enlarged image as proof of readable small print. If the original text is unclear, look for a better source.
How this tool works
Upscale Image uses ImageMagick to handle the source on the server. The Upscale Image request uses your chosen input rather than any local editing project left on your device. Check the PNG contents produced by Upscale Image before treating them as ready for another app or reader.
For Upscale Image, your browser uploads the source to our file-processing server. This is a server task, not local editing.
Files are due for deletion within 1 hour. Cleanup runs during normal service operation. Keep a local download for future use.
Upscale Image questions and answers
If Upscale Image gives an unexpected result, start by checking the source type and the values used in the form. Check the PNG contents from Upscale Image as well as the filename or displayed message. For another result type, compare Upscale Image with the separate tools described in these answers.
What matters when using Upscale Image?
Check that small source text is still useful after enlargement. View that area at its intended display size. Note any differences that affect your purpose.
Why try Resize Image?
Resize Image offers another task beside Upscale Image: fit an image within width and height bounds while preserving proportions. Resize Image returns PNG. The stated PNG output from Upscale Image matches a listed input type for Resize Image.
Why try Sharpen Image?
Sharpen Image offers another task beside Upscale Image: enhance image sharpness and clarity. Sharpen Image returns PNG. The stated PNG output from Upscale Image matches a listed input type for Sharpen Image.
Why try Compress Image?
Compress Image offers another task beside Upscale Image: reduce image file size by adjusting quality. Compress Image returns JPG. The stated PNG output from Upscale Image matches a listed input type for Compress Image.
What if my PNG result does not open?
For a failed Upscale Image result, first confirm that the download completed and that the viewer supports PNG. Try another local viewer for that format.
Record any error message for support. Keep private source material out of the report.
How do I report a problem with Upscale Image?
Contact support with the Upscale Image page name, source format and the error you saw. Mention any relevant form settings you chose. Do not send passwords or private attachments.