What's the best way to fix a photo that's too dark?

A modest brightness boost combined with a slight contrast increase usually looks more natural than pushing brightness alone to an extreme — large, single-adjustment changes tend to wash out the image rather than genuinely fixing it.

Can I preview the changes before downloading?

Yes — adjustments preview in real time as you move the sliders, so you can see the effect before committing to a download.

Do the preset filters (Sepia, Grayscale, etc.) replace the sliders, or work together?

They stack together — picking Sepia and then boosting Brightness applies both at once, rather than one replacing the other. If a combination looks off, switch back to "None" to reset just the preset while keeping your slider adjustments.

Can I adjust saturation, or only brightness and contrast?

All three — Brightness, Contrast, and Saturation each have their own slider. Saturation at 0% produces a fully grayscale result; above 100% makes colors more vivid than the original.

Is the blur amount adjustable?

No — Blur is a single fixed preset, not an adjustable slider. If you need a different blur intensity, that level of control isn't available here currently.

Are these "AI" or "professional" filters, or something simpler?

Simpler, and honestly so — these are real CSS image filters (the same filter technology browsers use natively), applied directly to the pixel data. They're genuinely effective for common adjustments, but this isn't AI-based enhancement or a simulation of professional color-grading software.

Are my images uploaded to a server?

No — every filter and adjustment is applied entirely in your browser. Your image never leaves your device.

Can I apply the same filter settings to multiple images at once?

Not here — this handles one image at a time, and settings reset when you upload a new one. There's no batch mode for applying identical filter settings across several images.

Do the presets and sliders work together?

Yes. A preset such as Sepia and the Brightness, Contrast and Saturation sliders stack rather than replace each other. Blur is applied first, then the colour changes are calculated on top.

What does Effect strength do?

For Grayscale, Sepia and Invert it blends between the original and the full effect, so 50 percent gives a halfway look. For Blur it sets how soft the picture becomes, scaled to the width of the image.

Is the download the same size as the preview?

The preview is reduced to at most 1200 pixels on its longest side, but the download applies the same settings to the full-resolution picture, so you get the original dimensions.

What ranges do the sliders cover?

Brightness and Contrast run from 50 to 200 percent, Saturation from 0 to 200, and Effect strength from 0 to 100, with Blur starting at 5. In every case 100 on the three adjustment sliders means no change.

Why do results match on iPhone and desktop?

Colour changes are calculated pixel by pixel in code rather than through the canvas filter feature, which Safari on iPhone does not support. That keeps the downloaded file identical to the preview on every browser.

Home/Image Tools/Add Filters & Effects

Add Filters & Effects

Apply real browser-based filters and effects to images

Files never storedRuns on your device

Drop an imageTap to choose an image

or click to browseor tap to choose

Apply filters and effects

Large files (over 50 MB) may take longer or run out of browser memory

About Add Filters & Effects

Applies visual filters and adjustments — brightness, contrast, saturation, black-and-white, and similar effects — to an image directly in your browser, calculated pixel by pixel so the result is identical on every browser, including Safari on iPhone. Useful for fixing a photo that came out too dark or washed out, giving a set of images a consistent look, or simply preparing an image for a specific use without opening a full photo editor.

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What's the best way to fix a photo that's too dark?: A modest brightness boost combined with a slight contrast increase usually looks more natural than pushing brightness alone to an extreme — large, single-adjustment changes tend to wash out the image rather than genuinely fixing it.
Can I preview the changes before downloading?: Yes — adjustments preview in real time as you move the sliders, so you can see the effect before committing to a download.
Do the preset filters (Sepia, Grayscale, etc.) replace the sliders, or work together?: They stack together — picking Sepia and then boosting Brightness applies both at once, rather than one replacing the other. If a combination looks off, switch back to "None" to reset just the preset while keeping your slider adjustments.
Can I adjust saturation, or only brightness and contrast?: All three — Brightness, Contrast, and Saturation each have their own slider. Saturation at 0% produces a fully grayscale result; above 100% makes colors more vivid than the original.
Is the blur amount adjustable?: No — Blur is a single fixed preset, not an adjustable slider. If you need a different blur intensity, that level of control isn't available here currently.
Are these "AI" or "professional" filters, or something simpler?: Simpler, and honestly so — these are real CSS image filters (the same filter technology browsers use natively), applied directly to the pixel data. They're genuinely effective for common adjustments, but this isn't AI-based enhancement or a simulation of professional color-grading software.
Are my images uploaded to a server?: No — every filter and adjustment is applied entirely in your browser. Your image never leaves your device.
Can I apply the same filter settings to multiple images at once?: Not here — this handles one image at a time, and settings reset when you upload a new one. There's no batch mode for applying identical filter settings across several images.
Do the presets and sliders work together?: Yes. A preset such as Sepia and the Brightness, Contrast and Saturation sliders stack rather than replace each other. Blur is applied first, then the colour changes are calculated on top.
What does Effect strength do?: For Grayscale, Sepia and Invert it blends between the original and the full effect, so 50 percent gives a halfway look. For Blur it sets how soft the picture becomes, scaled to the width of the image.
Is the download the same size as the preview?: The preview is reduced to at most 1200 pixels on its longest side, but the download applies the same settings to the full-resolution picture, so you get the original dimensions.
What ranges do the sliders cover?: Brightness and Contrast run from 50 to 200 percent, Saturation from 0 to 200, and Effect strength from 0 to 100, with Blur starting at 5. In every case 100 on the three adjustment sliders means no change.
Why do results match on iPhone and desktop?: Colour changes are calculated pixel by pixel in code rather than through the canvas filter feature, which Safari on iPhone does not support. That keeps the downloaded file identical to the preview on every browser.

How to use Add Filters & Effects

Drop an image and a live preview appears. Choose one of five preset buttons: None, Grayscale, Sepia, Blur or Invert. Once any preset except None is active, an Effect strength slider shows up from 0 to 100 percent; for Blur it is labelled Blur strength and cannot go below 5. Beneath the preview are three sliders that always work on top of the preset: Brightness and Contrast from 50 to 200 percent, and Saturation from 0 to 200 percent. Each starts at 100, meaning unchanged.

Drag them while watching the preview. Download saves the filtered picture at its full size, named with filtered_ in front, in the same format as the original. Reset puts every control back to its starting value and clears the loaded picture.

When to use it

It suits quick tidying of a dim or flat snapshot, turning a colour scan into black and white before printing, giving a set of product photos a matching sepia tone, softening a background picture that will sit behind text, or inverting a light-on-dark screenshot so it prints with less ink. A preset and the sliders combine, so one pass can lighten and tone together.

When not to use it

This is whole-picture adjustment only. It cannot remove a background, retouch blemishes, fix red eyes or correct a tilted horizon, and Blur cannot be limited to one corner while the rest stays sharp. For turning an image use Flip & Rotate, and for cutting out a subject use the background removal tool. Heavy edits to a photo you care about are better made on a copy.

Tips for best results

Prefer several small moves to one big one: a modest Brightness lift with a slight Contrast boost reads more naturally than either pushed to an extreme. Grayscale below full strength gives a faded, muted look instead of pure black and white, and Saturation at 0 is another route to gray. Blur is applied before the colour changes, and its strength scales with picture width, so the preview matches the download.

Limitations

Every adjustment is global and numeric; there are no masks, curves or selective colour. The preview is limited to 1200 pixels on the longest side to stay responsive, so fine detail is judged at reduced size, although the download is processed at full resolution. Strong blur on a very large picture takes longer. A JPEG is re-saved at 0.92 quality, so filtering the same saved copy again and again adds up.

Privacy

The pixel arithmetic runs as JavaScript on your device: the picture is drawn to a canvas, each pixel's colour values are recalculated inside the tab, and the result is written straight from memory when you press Download. No network request carries your picture. Because the tool does not rely on the browser's built-in canvas filters, the same settings give the same result on every browser.