About ImageMint
A small set of free image tools that run entirely in your browser.
What ImageMint is
ImageMint is a free collection of image, sprite and PDF tools that run in a web browser. There is nothing to install, no account to create, and no file size tier to unlock. You open a page, select supported files, and get your files back.
There are 23 tools across Sprite Tools, Image, Game Art, Web & Social and PDF.
Split, assemble and preview animation frames.
Sprite Sheet Slicer · Sprite Sheet Generator · Sprite Sheet Animator · GIF to Sprite Sheet · Aseprite Sprite Sheet Unpacker
Prepare photos for sharing, uploads and everyday editing.
Image Compressor · Image Converter · Image Resizer · Image Cropper · Background Remover · HEIC to JPG Converter · DNG to JPG Converter
Extract tiles, clean edges and inspect pixel colors.
Tileset Splitter · PNG Edge Cleaner · Pixel Art Upscaler · Pixel Art Palette Extractor · Image to Pixel Art
Prepare branded images, profile grids and site icons.
Watermark Images · Instagram Resizer · Instagram Grid Splitter · Favicon Generator
Why it exists
ImageMint started as one tool for slicing sprite sheets. That is why the source repository is still called gridslicer, and why the oldest page on the domain is a grid slicer. The collection grew to cover the chores around that one job: the sheet arrived with a background that had to come off, the frames needed repacking, the exported files were too heavy to ship, someone wanted the whole thing as a PDF. The collection now includes phone-photo conversion, cropping, watermarks, animation-frame utilities and PDF merging as well.
None of these chores needs a desktop application. The usual answer is to open Photoshop, GIMP, or Aseprite and do it by hand, which is a lot of setup for a task that takes ten seconds once it is set up correctly. Browsers have had the Canvas API for years, and it is more than capable of this work. ImageMint is what happens when you build those chores as web pages instead.
Sprite tools and game-art utilities remain part of the collection. Other tools support everyday jobs: resizing a batch, getting a photo under an upload limit, turning scans into a PDF. If you work with images in quantity, something here probably fits.
How it is built
The site is a Next.js static export. There is no backend and there are no API routes — every tool is just a page, and the work is done in the browser using image APIs and local GIF, PDF, HEIF and RAW libraries. Photo conversion uses a Web Worker and WebAssembly; it is not a server-side conversion service.
One piece of that deserves a plain explanation. The sprite-boundary detection behind Magic Slice — the part that guesses where one frame ends and the next begins — was written by Claude, an AI assistant. It was written by AI; it is not powered by AI. What actually runs when you press the button is ordinary code that walks the image's alpha channel looking for gaps. There is no model, no inference, and no network call anywhere in it, and the same image fed in twice will give you the same slices twice.
Your images stay on your machine
Selected images, PDFs and sprite metadata are processed locally in your browser. Your files are read by the page, worked on in memory, and written back out as downloads. Their contents are not uploaded by the tools.
The current application is a static export with no processing backend or file upload endpoint. Network requests still load pages, scripts and decoder assets, and configured analytics or advertising can send usage information. Local file processing does not mean the entire page makes no network requests. See the privacy policy for the distinction.
A practical side effect is that everything runs at the speed of your own hardware, without uploading the selected originals. The trade-off is that very large images are limited by your device's memory rather than by a server farm.
Who builds it, and how it is paid for
ImageMint is developed and operated by Midnight Orange Studio, a sole proprietorship registered in South Korea, represented by Sangwon Lee. For operator details and support, see the contact page.
The tools are free to use, with no paid tier or account required. Each tool has its own supported formats and safety limits. The site may show ads to cover hosting costs. Nothing is held back behind a signup, and there is no payment required to use the current tools.
Tell me what is broken
Most improvements here started as someone describing a sprite sheet that would not slice cleanly. If a tool gets something wrong, or you need an export format or option that is missing, the contact page is the fastest way to reach me. Concrete examples help more than anything else.