Image Tools

Generate the full set of favicon, Apple touch, Android and Windows tile sizes from a single image, with the HTML link tags and the web manifest entries.

Encode images to Base64 strings or decode strings back to images.

Decode a Base64 string or data URL back into a viewable image and download it as a file. Supports PNG, JPG, GIF and WebP data URLs. 100% private, no uploads.

Generate a before and after comparison slider with a draggable divider, using only HTML and CSS with a range input, so it works without JavaScript and with a keyboard.

Crop any image into a perfect circle with a transparent background — ideal for round profile pictures and avatars. Exports as PNG. 100% private, no uploads.

Turn any photo into a stylish duotone image by mapping shadows and highlights to two custom colors. Adjustable colors and one-click download. 100% private, no uploads.

Extract and view EXIF metadata from images including camera info, GPS, and timestamps.

Extract hidden EXIF data (Camera, GPS, Settings) from images.

Generate favicons and app icons at every required size from one source image, with the exact HTML to reference them.

Rotate images 90 degrees or flip them horizontally/vertically.

Convert an image to a halftone dot pattern with adjustable dot size, screen angle and shape, reproducing the technique that made photographic printing possible.

Stretch an image histogram to use the full tonal range, with per-channel and luminance modes, clipping control and a histogram comparison before and after.

Apply blur effects to images for privacy protection or artistic purposes.

Add colorful borders and rounded corners to your photos.

Increase or decrease image brightness levels.

Simple tool to twitch brightness, contrast, and saturation.

Add a caption to an image with a solid bar, a gradient scrim or an outline, with the contrast checked against the pixels actually behind the text.

Split an image into its red, green, blue, alpha, hue, saturation and lightness channels, and see which one carries the detail and which carries the noise.

Combine up to 4 images into a beautiful grid collage.

Extract dominant colors from any image to create color palettes.

Count the distinct colours in an image, see the most frequent ones with their share, and find out whether it would fit in a reduced palette format like PNG-8 or GIF.

Replace a colour throughout an image with a tolerance and soft edge, using perceptual distance so the selection matches what the eye considers the same colour.

Compress JPG, PNG and WebP images in your browser to cut file size without visible quality loss. Nothing is uploaded.

Enhance or reduce image contrast locally.

Crop images to any aspect ratio or exact pixel dimensions in your browser. Nothing is uploaded.

Compare two images pixel by pixel to find what changed, with a difference heatmap, a tolerance threshold, and the percentage of pixels that differ.

Detect edges with Sobel, Prewitt or Laplacian convolution, with gradient direction, threshold control and an explanation of what each operator responds to.

Encode the same image at several qualities and in several formats in the browser, and compare the resulting sizes to find the point where further quality costs bytes without visible gain.

Apply grayscale, sepia, invert, vintage and cool filters to a photo, adjust brightness, contrast and saturation, and download the result. Nothing is uploaded.

Convert images between formats locally in your browser.

Add a border, a gallery mat, a polaroid frame or a rounded card to an image, with the frame drawn outside the picture so nothing is cropped.

Convert images to greyscale in your browser, with the luminance weighting that makes the difference between good and flat results.

Upload a photo and see its red, green, blue and luminance histograms with mean brightness. Processing is local; the image never leaves your device.

Extract and view metadata from your photos.

Invert colors of an image to create a negative effect.

Add gaussian, uniform or film-style grain to an image, with luminance and colour noise separated, and generate pure noise textures for testing.

Extract the dominant 5-color palette from any image.

Pixelate an entire image or create a retro mosaic effect with an adjustable block size. Great for censoring or 8-bit art. Download the result. 100% private.

Reduce an image to a chosen number of tonal levels or colours, with and without dithering, and see the file size saving that colour reduction produces.

Convert between pixel dimensions, print size and resolution, check whether an image has enough pixels for a given print, and see the viewing distance that changes the answer.

Redact regions of an image with a solid block, so the hidden pixels are genuinely destroyed rather than covered, with an explanation of why blurring and pixelation are not redaction.

Resize images in your browser with aspect ratio control and format conversion. Files are processed locally and never uploaded.

Rotate images 90 degrees or flip them horizontally/vertically.

Sharpen an image with an unsharp mask or a convolution kernel, with radius, amount and threshold controls, and a halo warning when the settings are pushed too far.

Convert an image to two tones with a manual threshold or automatic Otsu selection, with adaptive thresholding for uneven lighting and a histogram showing where the split falls.

Convert any image or photo into ASCII text art right in your browser. Adjustable width, character set and inversion. Download as a .txt file. 100% private.

Combine images into a single PDF with page size and orientation control. Runs in your browser with nothing uploaded.

Flatten a transparent image onto a solid colour, a chequerboard or a gradient, so it can be saved as JPEG or used where transparency is not supported.

Add or remove a vignette with control over size, softness, shape and colour, and correct the lens vignetting that a wide aperture introduces.

Add a text watermark to a photo with control over text, colour, opacity, size and position, then download the result. Runs entirely in your browser; the image is never uploaded.

Convert JPG to PNG in your browser. Understand what the conversion can and cannot recover, and when PNG is the wrong choice.

Convert JPEG images to WebP for typically 25 to 35 percent smaller files at the same visual quality.

Turn any image into a kaleidoscope or a seamlessly tiling pattern using mirror symmetry, with control over the number of segments and the source region.

Generate a tiny blurred placeholder as an inline data URI or a dominant-colour block, so an image area has something in it before the real file arrives.

Upload a photo and add top/bottom text instantly.

Generate placeholder images at any size with custom colours and label text. Produced in your browser as downloadable files, no external hotlinking.

Convert PNG to JPG in your browser to cut file size, with control over quality and what happens to transparency.

Convert PNG to WebP to cut file size while keeping transparency. Choose lossless for graphics or lossy for photographs.

Generate srcset and sizes markup with the correct width descriptors, resize an image to every breakpoint in the browser, and see the bytes saved against serving one large file.

Add smooth rounded corners to any image with an adjustable radius and export a transparent PNG. Perfect for cards, avatars and UI assets. 100% private, no uploads.

Resize images for Instagram, Twitter, Facebook, and LinkedIn instantly.

Remove a flat background colour by selecting it, with edge feathering, spill suppression and a flood fill mode that only removes background connected to the edges.

Combine several images into one sprite sheet with padding, and generate the background-position CSS or the CSS custom properties for each sprite.

Generate smooth organic blob shapes with adjustable complexity, randomness and colour, then copy the SVG code or download the file. Scalable, tiny and pure vector.

Rasterise SVG to PNG at any scale, target width, height or print DPI, with the intrinsic size explained and the common causes of silent conversion failure detected up front.

Convert images to WebP for smaller files, or back to JPG and PNG for compatibility. Runs in your browser with no upload.

Convert WebP images to JPEG for maximum compatibility, with control over quality and how transparency is handled.

Convert WebP images to PNG in your browser for software that will not open WebP. Transparency is preserved.