Free tools › Images
Upscale image
The thumbnail, the old scan, the tiny logo: bigger, and sharper than a stretch.
More free conversions, where you upload. The Fylane extension does the same work inside any upload form, on its own free share every day.Add to Chrome
How to upscale image
- Drop the picture.
- Choose 2× or 4×.
- Press Enlarge and download.
What happens to your file
Real-ESRGAN, a neural network trained to guess what a sharper picture looked like, runs over the image tile by tile on Fylane’s servers and writes four or sixteen times the pixels; the answer keeps your format. The detail it adds is invented from context — plausible, not recovered.
Ceilings keep a job to minutes: a megapixel in for 2×, a quarter for 4×; anything larger is refused with the way out. Resize first for a bigger source.
Questions
Will it recover a face or a licence plate?
No. It invents detail that looks right; it cannot know what was there. Do not treat the result as evidence.
Why is it slow?
A network runs over every 128-pixel tile — a megapixel is about sixty tiles, four or five minutes on the one CPU the task has.
Do it once, not on every form
A form that wants a square JPEG under 240 KB says so on the page. The Fylane extension reads that, fits your photo to it, and puts it in the field — without you working out what 240 KB looks like.
And it keeps the result. The next application that asks for a résumé, a cover letter and a photo fills all three from one tap, each one refitted to what that site accepts.
Your files stay in the browser, encrypted, on your machine. Nothing is uploaded to keep them and nothing is sent anywhere to fill a form.
Related tools
Do this in code
curl -X POST https://api.fylane.dev/v1/jobs \
-H "Authorization: Bearer $FYLANE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"file_id": "<file id>",
"operation": "image.upscale",
"options": {
"factor": 2
}
}'The same operation, image.upscale — A picture enlarged ×2 or ×4 by Real-ESRGAN (`factor`), detail invented where there was none; ×2 up to a megapixel in, ×4 up to a quarter. Answers in the picture’s own format unless `format` says otherwise. Upload first with the quickstart; every option is on the operations page. 500 free credits a month, then $5 per thousand.