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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.About the extension

How to upscale image

  1. Drop the picture.
  2. Choose 2× or 4×.
  3. 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 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.