Free Online Image Tools

Olutil stands for Online Utilities — a growing suite of privacy-first, browser-native web tools. This sub-site hosts a complete set of image tools: resize, compress, convert between formats, crop, rotate, pick colors, extract metadata and more. 100% Local Processing

Convert

• Image Converter

  Convert between JPG, PNG, WebP and AVIF formats.

• Image to Base64

  Convert an image file to a Base64 data URI string.

• Base64 to Image

  Decode a Base64 data URI back into a downloadable image.

• Image to ICO

  Generate a multi-size .ico favicon from any image.

• Image to SVG

  Turn a raster image into a crisp scalable pixel-art SVG.

• Image to PDF

  Combine one or more images into a multi-page PDF.

• Image to GIF

  Combine multiple photos into an animated GIF.

Resize & Crop

• Image Resizer

  Resize images to exact pixel dimensions with aspect-ratio lock.

• Image Cropper

  Crop images with a draggable selection box and live preview.

• Image Rotator

  Rotate 90/180/270° and flip horizontally or vertically.

• Image Splitter

  Cut a photo into a grid of downloadable tiles.

• Image Collage

  Combine several photos into a grid collage.

• Image Upscaler

  Enlarge images 2×/3×/4× with bicubic interpolation.

• ID Photo Maker

  Crop a photo to passport & visa sizes with a bg color.

• Placeholder Image

  Generate SVG/PNG/JPG placeholder images from scratch.

Optimize

• Image Compressor

  Reduce JPG, PNG, WebP file size by adjusting quality.

Edit

• Image Watermark

  Add text or logo watermarks over a photo.

• Image Filters

  Grayscale, sepia, invert, hue-rotate and more presets.

• Image Adjuster

  Brightness, contrast and saturation sliders.

• Image Rounder

  Round the corners of a photo with transparent bg.

• Image Pixelator

  Turn a photo into chunky mosaic blocks.

• Image Blur

  Apply a blur to a photo or image.

Analyze

• Image Color Picker

  Pick colors from any image and copy HEX, RGB or HSL.

• Color Palette Extractor

  Extract a dominant-color palette from an image.

• EXIF Viewer

  Inspect camera metadata embedded in a JPEG photo.

• EXIF Remover

  Strip all metadata from a photo by re-encoding.

• Image Diff

  Compare two images with a draggable before/after slider.

Creative

• Image to Perler Beads

  Convert a photo into a printable Perler bead pattern chart.

• Image to Cross Stitch

  Turn a photo into a cross-stitch pattern with thread counts.

• Image to LEGO

  Convert a photo into a LEGO mosaic with brick counts.

• Image to Pixel Art

  Quantize to retro palettes like Game Boy, NES, PICO-8.

• Image to ASCII Art

  Render a photo as text using ASCII characters.

How It Works

Every tool on this site follows the same principle: open the page, drop or paste your image, adjust the options, and download the result. There is no account to create and no file is ever transmitted over the network. The Canvas API, File API and a handful of modern browser features do all the heavy lifting on your own device.

• Open a tool — click any card above to launch a dedicated page.
• Load an image — drag a file onto the upload box, click to browse, or paste from the clipboard with Ctrl/⌘+V.
• Adjust settings — each tool exposes only the controls relevant to its job, so the UI stays uncluttered.
• Download — results are offered as a direct download link or a copy-to-clipboard string.

Frequently Asked Questions

Are these image tools really free?

Yes. Every tool is free with no usage limits, no watermarks and no sign-up. Olutil is ad-supported so it can stay free for everyone.

Do you store or upload my images?

No. All processing runs locally in your browser. Your data is not uploaded to any server. The image never leaves your device.

What image formats are supported?

JPG, PNG, WebP, GIF and AVIF (where the browser supports them) can be loaded. Output format depends on each tool — most can export to JPG, PNG or WebP.

Do these tools work offline?

Once a page is loaded it can run without a network connection, because all logic is plain JavaScript bundled in the page.

Is there a file size limit?

There is no server-side limit. The practical ceiling is your browser's available memory — very large images may be slow but will still work.