Photo Editor
Fix exposure, boost color, crop to the perfect frame and add a filter in one place. Every change can be undone, and your photo never leaves your device.
How to use the Photo Editor
- Open a photo by dropping it on the box, choosing a file or pasting with Ctrl+V.
- Adjust exposure, contrast, color and more with the sliders; double-click a value to reset it.
- Crop and rotate: open the Crop & rotate tab, drag the box or its handles (or type exact numbers), pick an aspect ratio and press Apply crop.
- Add a filter from the Filters tab, and use Undo, Redo or Hold to compare at any time.
- Download the edited photo as JPG, PNG or WebP at full resolution.
What each adjustment does
| Slider | Effect | Calculation (values 0–1) |
|---|---|---|
| Exposure | Brightens or darkens like changing the shutter speed, ±2 stops | RGB × 2value / 50 |
| Brightness | Lifts or lowers every tone evenly | RGB + value × 0.003 |
| Contrast | Spreads tones away from (or toward) middle gray | (RGB − 0.5) × factor + 0.5 |
| Highlights / Shadows | Brightens or darkens only the light or the dark tones | + amount × L² or × (1 − L)² |
| Saturation | Makes all colors stronger or grayer | L + (RGB − L) × (1 + value / 100) |
| Vibrance | Boosts muted colors more than already-strong ones; kinder to skin | Saturation scaled by (1 − chroma) |
| Temperature / Tint | Warmer (orange) or cooler (blue); green or magenta | Shifts the red/blue or green channel |
| Hue | Rotates all colors around the color wheel | Luminance-preserving hue rotation matrix |
| Fade | Lifts the blacks for a matte, film look | f + RGB × (1 − f) |
| Vignette | Darkens (negative) or lightens (positive) the corners | Smooth falloff from 40% of the radius |
L is the luma of the pixel, 0.299 R + 0.587 G + 0.114 B. Example: a red pixel (220, 40, 40) with Brightness +50 adds 0.15 to every channel: red is capped at 255 and green and blue rise from 40 to 78, giving (255, 78, 78).
A quick editing workflow
- Straighten and crop first so the later adjustments are judged on the final frame.
- Fix exposure until the main subject looks right, then use Highlights to recover a bright sky and Shadows to open up dark areas.
- Set white balance with Temperature and Tint so whites look neutral.
- Add contrast and vibrance sparingly; +10 to +25 is usually enough.
- Finish with a filter or vignette, then hold Compare to check you have not overdone it.
Common crop sizes
| Use | Aspect ratio | Typical pixel size |
|---|---|---|
| Profile pictures, square posts | 1:1 | 1080 × 1080 |
| Portrait feed posts | 4:5 | 1080 × 1350 |
| Stories, reels, short videos | 9:16 | 1080 × 1920 |
| Video thumbnails, desktop wallpapers | 16:9 | 1280 × 720, 1920 × 1080 |
| Classic 35 mm prints (4×6 in) | 3:2 | 1800 × 1200 at 300 dpi |
| Compact cameras, tablets | 4:3 | 2048 × 1536 |
Frequently asked questions
Is this photo editor really free?
Yes. There is no sign-up, no watermark and no limit on the number of photos. All editing runs in your browser.
Are my photos uploaded to a server?
No. The photo is loaded into a canvas on your own device and every adjustment is calculated there. Nothing is sent over the internet, so even private photos stay private.
How do I crop a photo to a square?
Open the Crop & rotate tab, choose 1:1 square as the aspect ratio, drag the box to the part you want to keep and press Apply crop. You can also type the exact X, Y, width and height in pixels.
Can I undo a change?
Yes. Undo and Redo keep the last 40 steps, including crops, rotations, filters and slider changes. Ctrl+Z and Ctrl+Y work too, and Reset all returns to the photo you opened.
Does editing reduce the resolution?
No. Large photos are previewed at a smaller size for speed, but the download is processed from the full-resolution original. Only cropping changes the pixel size.
What is the difference between brightness and exposure?
Exposure multiplies all values, like opening the camera aperture, so highlights brighten faster than shadows. Brightness adds the same amount to every pixel, which also lifts dark areas. Use highlights and shadows to target only the bright or dark parts.
Which format should I save in?
JPG is best for sharing photos and gives small files. PNG is lossless and keeps transparency. WebP is usually smaller than JPG at similar quality and is supported by all modern browsers.