Images
Universal File Converter
Convert images, whole PDFs, Word DOCX, Excel XLSX, text, CSV and JSON on your device.
New: File Converter
Images, whole PDFs, Word DOCX, Excel XLSX, text, code, CSV and JSON stay on your device. KitLumo never receives or stores a copy.
Free online utilities
Straightforward tools that work right here on your phone, tablet or computer. No account, no AI, no nonsense.
KitLumo Image tools
Image tools solve different problems. Resize when the pixel dimensions are wrong, crop when the composition needs a different shape, and compress when the file is too large. Converting formats can also affect transparency, metadata and quality.
The current image tools process files in the browser on your device. Downloaded copies should be opened and checked at the size where they will actually be used before you replace an original.
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Practical guides
Short, plain-language guides explain the assumptions, privacy and limits behind the most important KitLumo tools.
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On this device
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4 tools
Images
Convert images, whole PDFs, Word DOCX, Excel XLSX, text, CSV and JSON on your device.
Images
Resize JPG, PNG and WebP images on your own device.
Images
Reduce JPG or WebP file size locally with a quality control.
Image
Crop an image in your browser and download a PNG copy.
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Help shape KitLumo
Tell us the task you are trying to solve. The most-requested tools guide what we build next.
How KitLumo stays free
Clearly labelled ads fund the website so everyone can use every tool for free. If KitLumo saves you time, you are also welcome to make an optional donation to help pay for hosting and keep the tools available.
Donating never unlocks extra features. Every tool remains free for everyone.How it works
KitLumo is built around small, focused utilities. No login walls, no artificial limits and no AI layer where a reliable tool will do.
Every tool currently available works directly on the phone, tablet or computer you are using. Anything you type, paste, calculate or open in a tool is not sent to us, and KitLumo does not save a copy.
Your saved and recently used tool shortcuts are stored only in your browser on this device. When you use “Report a problem” or “Request a free tool,” only that message and any email address you choose to add are sent to KitLumo.