Image Adjustments

Fine-tune how an image looks without installing anything: raise or lower contrast and brightness, boost or drain color, warm up or cool down the white balance, or turn a photo black and white, negative, sepia or vintage with one click. Every change previews instantly, hold the compare button to check it against the original, and the same look can be applied to a whole batch at once. Nothing is uploaded — all of it runs on your device.

Privacy-first: every image is processed locally in your browser. Nothing is uploaded, stored or transmitted to any server.

PixelVault’s image adjustment tool changes how a picture looks — its contrast, brightness, color and mood — without uploading it anywhere. Most “photo filter online” sites need your image on their servers before they can show you a single preview. Here the pixels stay in the page: every slider you move is recomputed on your own device, instantly, for as many images as you drop in.

The controls cover the adjustments that actually fix photos. Contrast pushes the light and dark tones apart to add punch, or pulls them together for a soft, faded look. Brightness lifts an underexposed shot or reins in a blown-out one. Saturation makes color richer or drains it away, warmth shifts the white balance between a cold blue and a golden orange, and a hue shift rotates every color at once for a deliberately unnatural effect. Auto levels does the analysis for you: it reads the histogram of each color channel, ignores the extreme ends, and stretches the rest across the full range — the single click that rescues most flat, hazy photos.

On top of that sit the effects people usually come looking for: black and white, a full color inversion that turns a photo into a negative, sepia toning, and a vignette that darkens the corners to pull the eye inward. One-click looks — B&W, Noir, Sepia, Vintage, Negative, Vivid, Warm, Cool, Fade and Bright — set several sliders at once as a starting point you can then adjust by hand. Hold the compare button to flip back to the original at any time, then export as JPG, PNG or WebP, one image or a whole batch as a ZIP.

How it works

Each image is decoded into memory and redrawn onto a canvas. Auto levels and warmth are applied first through a 256-entry lookup table per color channel, because both are remaps of the original tones and belong before anything else. Brightness, contrast, saturation, hue, sepia, black & white and inversion are then applied through the canvas filter pipeline, which the browser accelerates — that is why the preview keeps up with a slider drag even on a large photo. The vignette is composited last as an elliptical gradient. The preview works on a screen-sized copy for speed; your download is rendered again from the full-resolution original, so nothing you see costs you any detail.

Why local processing matters

Editing locally means the photos you are correcting — family pictures, client work, unpublished product shots, screenshots with private details — are never transmitted, cached or logged by anyone else. It is also simply faster: there is no upload, no queue and no download round-trip, results appear as you drag, and the whole tool keeps working offline once the page has loaded. What you download is exactly what your browser rendered, with no watermark and no sign-up.

Supported formats

  • JPG — Best for photos; adjustable quality on export.
  • PNG — Lossless, and keeps transparency through the adjustment.
  • WebP — Smaller files at the same quality, with transparency.
  • HEIC — iPhone photos are decoded locally, then exported as JPG, PNG or WebP.

Common use cases

  • Increase the contrast of a flat, gray photo or scanned document.
  • Convert a picture to black and white for a print or a portfolio.
  • Invert the colors of a scanned film negative to see the real image.
  • Brighten a photo shot in poor light, or tone down an overexposed one.
  • Give a batch of product shots one consistent look before publishing.
  • Apply a sepia or vintage treatment without installing an editor.

Frequently asked questions

Is my image uploaded to adjust it?
No. Every adjustment is computed on a canvas inside your browser, so the photo never leaves your device and no server ever sees it.
How do I make an image black and white?
Set the “Black & white” slider to 100% — or click the B&W look, which also adds a little contrast so the result does not look flat. Noir goes further with a much harder contrast curve.
What does inverting the colors do?
It replaces every color with its opposite, which turns a photo into a negative: white becomes black, blue becomes orange. It is how you read a scanned film negative, and a quick way to flip a screenshot to a dark version.
What is the difference between brightness and contrast?
Brightness moves every tone up or down together, so the whole picture gets lighter or darker. Contrast pushes light and dark tones apart, which adds punch — or, in the negative direction, flattens the image into a soft, hazy look.
What does Auto levels do?
It measures each color channel of your photo, ignores the extreme 0.4% at each end, and stretches what is left across the full range. Washed-out, hazy or underexposed shots usually snap back to life with a single click.
Can I adjust many photos at once?
Yes. Drop in as many images as you like — the settings apply to all of them, and you can download the results individually or together as a single ZIP.
Will adjusting reduce quality?
The adjustment itself works at full resolution with no downscaling. Only the re-encode matters: choose PNG for a lossless result, or keep JPG/WebP at a high quality setting.