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Adjust image

A photo that came out dark, flat or garish, corrected in one pass at full resolution.

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 adjust image

  1. Drop the image.
  2. Change at least one of the three.
  3. Press Adjust and download.

What happens to your file

Brightness and saturation are multipliers on the image’s lightness and colourfulness; contrast is a multiplier about mid-grey, so the middle tones stay put and the highlights and shadows move apart (or together). All three apply in one pass, on the full-resolution pixels, and the result is written in the format you chose.

These are the same measurements Fylane’s image analysis reports — exposure, contrast — so a photo the analysis calls dark can be corrected here by the amount it suggests.

Questions

Which should I change for a dark photo?

Brightness first. If it then looks washed out, add a little contrast. Saturation rarely helps a dark photo.

Does it clip the highlights?

Brightening can push already-bright pixels to white; that is what "much brighter" does to a sky. Try the smaller step first.

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.

Filmed from the extension: a phone portrait against a form that takes only a square JPEG under 240 KB.

Add to Chrome — freeWhat it does

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.adjust",
    "options": {
      "format": "same"
    }
  }'

The same operation, image.adjust — Tone: grayscale, brightness, contrast and saturation — each optional, each a multiplier with 1 as unchanged. Answers WebP 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.