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Guides
Short, practical guides on editing images privately — how in-browser tools work, how they compare to server-based tools, and how to keep your files safe. Every Rastera tool is free and processes your images on your device, never uploading them.
How Rastera works — in-browser image processing explainedRastera runs every image operation locally in your web browser, so your files are never uploaded to a server. This page explains, in technical detail, how that works and how you can verify it for yourself.Online vs local image tools: which is safer?Most 'online' image tools upload your file to a server to process it; local, in-browser tools process it on your own device and never upload it. For privacy, local tools are the safer choice. Here is a clear comparison so you can decide.Is it safe to edit images online?Editing images online is safe when the tool processes your file in your browser and never uploads it; it is riskier when the tool sends your file to a server. The single most important thing to check is whether your image leaves your device.