HEIC to PDF

HEIC is a more sophisticated format that requires CPU-intensive decoding compared to JPG. The browser-based an in-browser HEIC decoder library decodes each HEIC file by running an HEVC/H.265-derived decompression algorithm, which is slower than the well-optimized JPG decoders built into browsers. On a modern phone or laptop, each HEIC takes 1-3 seconds to decode; older devices can take longer. For batches of 50+ HEICs, conversion can take a minute or two — not a problem for occasional use, but worth knowing for large imports. The slowness is in the decode step; once decoded, embedding into the PDF is fast. To speed things up, convert HEICs to JPG first on the iPhone (Settings > Camera > Formats > Most Compatible saves new photos as JPG), then use JPG to PDF.

Minimal loss. HEIC stores images with lossy compression similar to JPG but more efficient. The tool decodes the HEIC to a raw pixel buffer (lossless step), then re-encodes as JPG for embedding in the PDF (lossy step, but at high quality). For typical iPhone photos, the visual difference is invisible to the eye — the file is just bigger because JPG is less efficient than HEIC. A 5 MB HEIC may become a 12 MB JPG embedded in the PDF, with no visible quality difference. If file size matters, run Compress PDF afterward to reduce the embedded images. Lossless HEIC variants (rare, used by some pro apps) are preserved as PNG to avoid any generation loss.

Live Photos are stored as an HEIC still image plus an MOV video file. The tool processes only the HEIC still — the video portion is not included, since PDFs cannot contain video. The result is a static photo PDF of the moment the Live Photo was captured (the same frame iOS shows as the cover). To preserve the motion, keep the original Live Photo as a Live Photo or export it as a video. For most archival or sharing purposes (sending a photo to family on Android, including a photo in a document), the static frame is what you want. iOS's built-in share sheet typically exports Live Photos as plain HEIC stills when sharing, so the tool gets the same single frame your share sheet would produce.

Yes. an in-browser HEIC decoder is pure JavaScript and runs in any modern browser regardless of OS. Windows and Android browsers have no native HEIC support, but the library implements decoding entirely in JavaScript, so the tool works the same way everywhere. The only requirement is that the browser supports the modern JavaScript features an in-browser HEIC decoder uses, which all current versions of Chrome, Firefox, Edge, and Safari do. Performance is similar to iOS Safari since the decoder is the bottleneck regardless of platform. This makes HEIC to PDF especially useful for non-Apple users who receive HEICs from iPhone-using friends or colleagues and need to view or share them — no Apple software required.

HEIC is Apple's variant of the HEIF (High Efficiency Image Format) standard. They share the same underlying compression and file structure; HEIC files use the .heic extension while generic HEIF files use .heif. The tool accepts both extensions and decodes them the same way. Some Android phones produce HEIF files (especially Samsung devices in space-saving modes), so the tool serves both Apple and Android users with the same conversion path. If you have a file with neither .heic nor .heif extension but you suspect it is HEIF-format (an .img or generic .image file), try renaming it to .heif and dragging it in — an in-browser HEIC decoder detects format by file content, not extension, so it usually works.

iPhones display HEICs with wide-color-gamut (P3) color processing and sometimes apply automatic enhancement that boosts saturation and contrast in the photo app. When the HEIC is decoded by an in-browser HEIC decoder and embedded as JPG in a PDF, the colors are mapped to standard sRGB without the iPhone's display-time enhancements, so the result can look slightly less vivid. This is the photo's 'true' color data, free of dynamic display tweaks. To preserve the iPhone look, use the iPhone's built-in Share Sheet to export the photo as JPG (which bakes in some enhancements), then use JPG to PDF. For perfectly accurate color, this is the correct behavior — the iPhone's enhancements are not part of the actual image data.