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Upscale image online — 2x, 4x, 8x

Free online image upscaler. Increase resolution by 2x, 4x or 8x with adaptive sharpening and an optional target file size — ideal for prints, posters and high-DPI screens.

⚙️ معلمات التشغيل

How does image upscaling work?

Upscaling enlarges the image by 2x, 4x or 8x using Lanczos interpolation and then applies sharpening tuned for the new size. The result is smooth, clean and noticeably sharper on high-DPI screens and in print, instead of the blurry look you get when a browser stretches a small image.

Upscaling does not invent photographic detail: it rebuilds pixels from what is in the file. For small web images, heavily downscaled photos and graphics the visual gain is clear; for text and line art use the sharpening carefully.

Which factors are available?

Upscaling uses Lanczos interpolation with adaptive sharpening. To keep results fast and stable the factor is automatically reduced for very large sources: the output never exceeds 40 megapixels and stays within format limits (16383 px per side for WebP and AVIF, 65500 px for JPEG).

How to upscale an image?

1. Upload a file — drag and drop a file or select it via the file picker.

2. Convert — adjust quality if needed and click "Process".

3. Download — get the converted file instantly.

How to control the output file size?

You can set a maximum file size in KB. The tool then picks the highest quality that still fits your budget, using an automatic binary search over the quality setting. Leave the field empty to keep maximum quality.

عمليات ذات صلة

Improve image quality Clean up artifacts and restore sharpness Improve WebP quality Re-encode or upscale your WebP file WebP to PDF Convert WebP to PDF online free WebP to ICO Convert WebP to ICO online free

❓ الأسئلة الشائعة

Is it free?
Yes, conversion is completely free with no limits.
Are my files safe?
Yes. Files are automatically deleted right after conversion and download.
How many files can I upload?
Up to 3 files at a time.
Is upscaling free?
Yes. You can upscale images online for free, without registration and without installing anything.
Why was my factor reduced?
Very large sources are capped at 40 megapixels output and format limits (16383 px per side for WebP and AVIF). In that case the tool picks the largest safe factor and reports it in the log.
Should I upscale a photo for printing?
Yes, but start from the largest available source. Upscaling 2x is usually enough; 4x and 8x mainly help small images and graphics, and produce much larger files.