Uwarp
Original image
Gamma adjusted

Upload an image and adjust gamma below—the preview appears here.

Gamma

Adjust gamma from 0.1 (darker midtones) to 5.0 (brighter midtones). Values above 1.0 brighten the image by lifting shadows; values below 1.0 darken the image by adding contrast. 1.0 keeps the original.

Gamma

Adjust image gamma online

Apply gamma correction to photos online: adjust image gamma from 0.1 to 5.0 for midtone fixes. Live preview, PNG download in your browser.

What is gamma correction?

Adjust image gamma to change midtone brightness with a power-law curve—not a flat linear shift. Gamma correction at 1.0 leaves the file unchanged; values above 1.0 brighten shadows and mids, while values below 1.0 add contrast to washed shots. The same workflow covers image gamma correction, gamma adjustment, gamma picture edits, and gamma transformation via a 256-entry lookup table. Processing runs entirely in your browser.

Common gamma search intents

Upload above, then move the slider—these queries map to the same gamma adjustment workflow.

  1. Gamma correction: Apply gamma correction with a 0.1–5.0 slider—values above 1.0 lift midtones, below 1.0 add punch to flat exposures.
  2. Gamma adjustment: Fine gamma adjustment for underexposed shadows or washed highlights without linear brightness clipping.
  3. Image gamma correction: Browser image gamma correction with side-by-side preview before you download the corrected PNG.
  4. Image gamma and gamma image: Dial image gamma on one file or compare gamma image output against the original in real time.
  5. Gamma picture and pic gamma: Fix a dark gamma picture or flat scan—pic gamma searches describe the same upload-and-slider flow.
  6. Gamma transformation: Power-law gamma transformation on RGB channels via lookup table—faster than manual curves for quick fixes.

Gamma correction controls

Power-law slider for image gamma and midtone gamma adjustment.

  1. Gamma slider 0.1 to 5.0: Full range control to brighten or darken midtones precisely.
  2. Lookup table optimization: Fast processing using precomputed gamma lookup table.
  3. Live preview: Preview updates as you drag—see results before download.
  4. Side-by-side comparison: Original and adjusted images shown together for easy comparison.
  5. PNG download: Save adjusted image as gamma-adjusted.png.
  6. Multiple formats: Upload PNG, JPEG, WebP, or GIF files.

How to adjust image gamma

Steps for gamma correction online.

  1. Upload the image: Drop or click in the input panel (15 MB max).
  2. Adjust gamma: Move the slider: above 1.0 to brighten, below 1.0 to darken.
  3. Preview the result: Compare original and adjusted side by side.
  4. Download PNG: Save when the preview matches your goal.

Tips for gamma adjustments

Get better results when adjusting gamma.

  1. Start with small changes: Gamma 0.8–1.3 covers most common corrections.
  2. Use for midtone control: Gamma is ideal for adjusting image tone without clipping.
  3. Combine with other tools: Use brightness/contrast after gamma for fine-tuning.
  4. Fix underexposed shots: Gamma 1.5–2.0 can recover detail in dark photos.
  5. Add contrast to flat images: Gamma 0.6–0.8 adds punch to washed-out photos.
  6. Use PNG for transparency: Alpha channels are preserved when adjusting gamma.

When to use gamma correction

Typical jobs for gamma image fixes and gamma picture recovery.

  1. Underexposed photos: Recover shadow detail by increasing gamma above 1.0.
  2. Overexposed photos: Add contrast to flat, washed-out images by decreasing gamma.
  3. Monitor calibration: Correct images for different display gamma settings.
  4. Scanned documents: Improve readability of faded or dark scans.
  5. Video frame correction: Fix individual frames with exposure issues.
  6. Print preparation: Adjust gamma for accurate print reproduction.

Why use gamma correction

Benefits of nonlinear brightness adjustment.

  1. Natural results: Midtone emphasis produces more pleasing adjustments than linear brightness.
  2. Preserve extremes: Shadows and highlights are less affected, preventing clipping.
  3. Private: Images stay on your device—no server upload.
  4. Instant preview: See changes in real time as you adjust.
  5. No install: Works in any modern browser.
  6. Free: Unlimited adjustments and downloads.

Technical details

How gamma correction works.

  1. Algorithm: Apply power-law transformation: output = 255 * (input/255)^(1/gamma).
  2. Lookup table: Precompute 256-entry LUT for fast per-pixel transformation.
  3. Color channels: Apply gamma equally to R, G, B channels; alpha unchanged.
  4. Rendering: Canvas 2D getImageData / putImageData.
  5. Input limits: 15 MB; longest edge 8192 px.
  6. Browser support: Chromium, Firefox, Safari with Canvas 2D.

Frequently Asked Questions

Have questions? We have answers.

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