GUIDES
Photo metadata, explained
What your images carry besides the picture, how to see it, and how to remove it without losing quality. Plus practical guides to image formats and file sizes.
Basics
Privacy
PRIVACYHow to remove EXIF data from photos without losing qualityStep-by-step: strip EXIF, GPS and other metadata from JPEG, PNG and WebP photos without re-compressing them, and check that nothing else changed.5 min readPRIVACYHow to remove location data from photos before you share themPhone photos often carry the exact GPS position where they were taken. How to check for it, remove only the location, and stop your camera adding it.5 min read
AI and provenance
AI AND PROVENANCEWhat are Content Credentials (C2PA)?Content Credentials are signed records of where an image came from and how it was edited. How C2PA works, where it is stored, and what it can and cannot prove.7 min readAI AND PROVENANCEHow to check if an image is AI-generated from its metadataWhat an image's metadata can tell you about AI generation: Content Credentials, IPTC digital source types and generator prompts, and the limits of each.6 min readAI AND PROVENANCEWhy AI images can contain your prompt, and how to see itStable Diffusion, ComfyUI and other generators save the prompt, seed and settings inside the PNG. How to read them, and remove them before sharing.5 min read
Formats
FORMATSHow to convert HEIC photos to JPGWhy iPhones save HEIC, why some websites reject it, and how to convert HEIC to JPG on any device without uploading your photos.4 min readFORMATSHow to compress an image to under 100 KB, 200 KB or 1 MBUpload forms often set a file size limit. How to make a photo small enough while keeping it readable, and when to resize instead of lowering quality.5 min read