Free Online Image Tools for GIMP Users

Q: Are these tools really free?

Yes. Completely free, no sign-up required, no watermarks, and no hidden limits beyond the 15 MB file size cap on image uploads.

Q: What DPI should I use for print?

Standard print is 300 DPI. Newspaper uses 200 DPI. Large-format banners viewed from a distance can use 100-150 DPI. Screen display is typically 72-144 DPI depending on the monitor.

Browser-based tools built for GIMP users and designers. No download, no signup, no watermarks. Your images never leave your browser.

35 free tools, grouped by what you are trying to do. Nothing needs an account.

Edit an image

The everyday jobs: cut something out, crop it, make it bigger, straighten it.

Background Remover

Turn a logo or product shot into a transparent PNG, right in your browser.

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Image Cropper

Drag a box, snap to a preset ratio, or crop to a circle. Nothing is uploaded.

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Image Resizer

Resize to exact dimensions with the aspect ratio locked. Bulk mode included.

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Image Upscaler

Enlarge a small image up to 4x with Lanczos resampling and smart sharpening.

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Rotate and Flip

Fix a sideways phone photo or straighten a crooked horizon by any angle.

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Image Compressor

Cut the file size for faster pages. Set the quality and download.

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Format Converter

Convert between PNG, JPG and WebP with no watermarks or limits.

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Image Splitter

Cut a picture into an even grid and download every tile as a ZIP.

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Make something

Turn what you have into a finished asset: an icon set, a meme, a watermark, an animation.

Watermark Maker

Add a text or logo watermark, tiled or in any corner, at any opacity.

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Favicon Generator

One image becomes a full icon pack, manifest and the HTML to paste in.

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Meme Generator

Classic top and bottom text on your own image. No watermark, no template list.

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GIF Maker

Turn up to twenty images into an animated GIF with bounce and loop control.

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Photo Border Maker

Add a clean border, a gallery mat, rounded corners or a polaroid frame.

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Passport Photo Maker

Official sizes for ten countries plus a print sheet with cut guides.

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Gradient Generator

Build linear, radial or conic CSS gradients and download a PNG swatch.

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Privacy and accessibility

Check what your file is telling people, and check it works for everyone.

EXIF Viewer and Cleaner

See the GPS location and camera data hidden in a photo, then strip it all.

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Blur and Pixelate

Hide a face, a plate or an address. Solid block mode for anything that matters.

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Alt Text Generator

Get a screen reader description, caption, keywords or a reverse prompt.

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Contrast Checker

Test any two colours against WCAG 2.1 AA and AAA thresholds.

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Colour Blindness Simulator

See your image through deuteranopia, protanopia, tritanopia and achromatopsia.

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Transparency Checker

Confirm a PNG really has a transparent background before you ship it.

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Colour and design

Pick colours, convert them, and see what a blend mode is going to do before you commit.

Colour Converter

HEX, RGB, HSL, HSV and CMYK, plus an eyedropper and colour harmonies.

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Colour Palette Generator

Pull the dominant colours out of any image as copyable HEX values.

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Blend Mode Visualizer

Stack two of your own images and flip through every GIMP layer mode.

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Work out a number

The maths that decides whether an image will print, fit or load fast enough.

Aspect Ratio Calculator

Find the matching dimension for 16:9, 4:5, 1:1 or any custom ratio.

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Social Media Image Sizes

Every platform placement with exact pixels, ratios and safe zones.

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DPI and Print Size

Turn pixels and DPI into real print dimensions before you send it off.

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Resolution Calculator

Convert pixels to print size and back at any DPI, in inches or cm.

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File Size Estimator

Estimate PNG, JPG, WebP or TIFF size from dimensions, before exporting.

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GIMP reference

Built for GIMP users specifically, and not available anywhere else.

Photoshop to GIMP Translator

Ninety Photoshop features mapped to their GIMP equivalent, or the workaround.

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Keyboard Shortcuts

Search and filter every GIMP shortcut, then print the cheat sheet.

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GIMP Folder Finder

The exact path for brushes, fonts, plugins and scripts on any system.

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Script-Fu Generator

Ten batch recipes that write working Script-Fu and Python-Fu for you.

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AI tools

Generate an image from a description, or describe one you already have.

AI Image Generator

Describe a picture and get an original image. No account, no watermark.

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AI Prompt Builder

Build a prompt block by block, with negative prompts and worked examples.

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Alt Text Generator

Turn an image into alt text, a caption, keywords or a reverse prompt.

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Why Use GIMP.cc Tools?

Privacy First

Your images are processed server-side and never stored. We do not retain, share, or analyze your uploaded files.

Fast & Free

No account required. No watermarks. No file size limits beyond 15 MB. Just upload and get your result.

GIMP-Focused

These tools are designed to complement your GIMP workflow. Prep files before importing, or quickly check properties.

Tool Quick Reference

Choose the right tool for your task. All tools run in your browser - No installation needed.

Tool	Best For	Input	Output	Max Size
Image Resizer	Changing image dimensions for web, social media, or print	PNG, JPG, WebP, GIF	PNG, JPG, WebP	15 MB
Image Compressor	Reducing file size for faster web page loading	PNG, JPG, WebP, GIF	JPG	15 MB
Color Palette Generator	Extracting dominant colors from photos or artwork	PNG, JPG, WebP, GIF	HEX codes, CSS	15 MB
Color Contrast Checker	Checking WCAG AA/AAA accessibility compliance	Two hex colors	Pass/fail ratings	-
DPI Calculator	Finding the right resolution before sending to print	Pixels + DPI	Print dimensions	-
Aspect Ratio Calculator	Scaling dimensions without distortion	Width or height	Proportional dimensions	-
Format Converter	Converting between PNG, JPG, and WebP	PNG, JPG, WebP, GIF	PNG, JPG, or WebP	15 MB
Transparency Checker	Verifying a PNG actually has a transparent background	PNG, WebP	Yes/No + preview	15 MB
Gradient Generator	Creating CSS gradients and downloading PNG swatches	Color pickers	CSS code, PNG	-
GIMP Keyboard Shortcuts	Looking up any GIMP shortcut, filtering by category, printing a cheat sheet	Search / filter	96 shortcuts, print view	-
Image Resolution Calculator	Converting pixels to print size (and back) at any DPI	Numbers	Inches, cm, pixels	-
Color Blindness Simulator	Testing designs for protanopia, deuteranopia, tritanopia, achromatopsia	PNG, JPG, WebP, GIF	Simulated previews	In-browser
Image File Size Estimator	Estimating PNG, JPG, WebP or TIFF file size before exporting	Numbers	Estimated sizes	-
Background Remover	Cutting a logo or product out onto transparency	PNG, JPG, WebP, GIF	Transparent PNG	In-browser
Image Cropper	Cropping to a ratio, a circle, or exact pixel values	PNG, JPG, WebP, GIF	PNG, JPG, WebP	In-browser
Image Upscaler	Enlarging a small image up to four times	PNG, JPG, WebP, GIF	PNG, JPG, WebP	15 MB
Rotate and Flip	Fixing sideways photos and crooked horizons	PNG, JPG, WebP, GIF	PNG, JPG, WebP	15 MB
Image Splitter	Slicing into a grid for carousels and sprite sheets	PNG, JPG, WebP, GIF	ZIP of tiles	15 MB
Watermark Maker	Adding a text or logo mark before publishing	PNG, JPG, WebP, GIF	PNG, JPG, WebP	In-browser
Favicon Generator	Building a full site icon pack from one image	PNG, JPG, WebP	ZIP with ICO and PNGs	15 MB
Meme Generator	Top and bottom caption text on your own image	PNG, JPG, WebP, GIF	JPG, PNG	In-browser
GIF Maker	Turning a set of images into an animation	Up to 20 images	Animated GIF	15 MB each
Photo Border Maker	Adding a border, mat or polaroid frame	PNG, JPG, WebP, GIF	PNG, JPG, WebP	15 MB
Passport Photo Maker	Official ID photo sizes plus a print sheet	PNG, JPG, WebP	ZIP with photo and sheet	15 MB
EXIF Viewer and Cleaner	Seeing and removing hidden GPS and camera data	PNG, JPG, WebP, GIF	Metadata report, clean file	15 MB
Blur and Pixelate	Hiding faces, plates and private details	PNG, JPG, WebP, GIF	JPG, PNG	In-browser
Colour Converter	Converting one colour between every format	Hex, picker, or an image	HEX, RGB, HSL, HSV, CMYK	In-browser
Blend Mode Visualizer	Seeing what each GIMP layer mode does	Two images	PNG preview	In-browser
Social Media Image Sizes	Looking up the exact pixels a platform wants	Search and filter	52 placements	-
Photoshop to GIMP Translator	Finding the GIMP equivalent of a Photoshop feature	Search and filter	90 mapped features	-
GIMP Folder Finder	Locating the brushes, fonts and plugins folders	OS and version	Copyable paths	-
Script-Fu Generator	Writing a batch script for a whole folder	Recipe and options	Script-Fu, Python-Fu, command	-
AI Image Generator	Making an original image from a description	Text prompt	PNG	-
AI Prompt Builder	Assembling a detailed prompt for any generator	Dropdown choices	Prompt text	-
Alt Text Generator	Writing accessible descriptions and captions	PNG, JPG, WebP, GIF	Text	15 MB

Image Format Guide

Not sure which format to use? Here's when to choose each one.

JPG

Photographs & web images

Smallest file size
Universal support
No transparency
Lossy compression

PNG

Logos, graphics & screenshots

Transparency support
Lossless quality
Larger than JPG
No animation

WebP

Modern web - Best of both

Smaller than PNG/JPG
Supports transparency
No print/email use
All modern browsers

GIF

Simple animation only

Animation support
Basic transparency
256 colors only
Large file sizes

Common Questions

Yes - Completely free, no sign-up required, no watermarks, and no hidden limits beyond the 15 MB file size cap on image uploads.

No. Uploaded images are processed in memory and returned immediately. We do not write files to disk or retain any user data.

Image upload tools accept files up to 15 MB. The calculator and color tools have no file size limit since they don't require uploads.

Yes. All tools are mobile-responsive and work in any modern browser on iOS and Android without needing to install an app.

WebP uses a more efficient compression algorithm (based on VP8 video codec) that preserves more detail at equivalent or smaller byte counts compared to JPEG's DCT-based compression.

Use the Image Resizer with the Sinc (Lanczos) resampling option for the highest quality downsample. For upscaling, NoHalo or Cubic tend to produce the sharpest results. Avoid resizing more than 2× from the original size.

Standard print is 300 DPI. Newspaper print uses 200 DPI. Large-format banners viewed from a distance can use 100–150 DPI. Screen display is typically 72–144 DPI depending on the monitor.

Yes - The Color Contrast Checker tests both AA (4.5:1 for normal text, 3:1 for large text) and AAA (7:1 for normal, 4.5:1 for large) thresholds as defined by WCAG 2.1.

Using These Tools in Your GIMP Workflow

Before opening in GIMP

Use the Image Resizer to downscale very large photos before editing - GIMP will open them faster.
Check the DPI Calculator to confirm your image has enough resolution before starting a print project.
Use the Format Converter to convert unsupported formats to PNG before importing into GIMP.

After exporting from GIMP

Run the Image Compressor on exported JPGs to squeeze file size further for faster web loading.
Use the Transparency Checker to confirm your background removal saved correctly as PNG.
Extract brand colors with the Color Palette Generator after finishing a design for use in future projects.