Take it step by step
- Choose the HEIC or TIFF converter for the saved file. A synthetic solid-colour example is available without providing a personal photo.
- Select JPEG for general photo sharing, or PNG for a lossless pixel export. PNG can be considerably larger.
- Process the file. Decoding runs in a dedicated worker, with a 20 MB input and 16-million-pixel decoded-image limit.
- Download the export, check orientation and colour, then use resize/crop, brightness or metadata cleaning tools as needed.
A situation to try.
The supplied 64 × 48 example is a synthetic rose-colour image. Tests decode both HEIC and LZW-compressed TIFF and check dimensions and pixel values. These small fixtures do not represent every phone or scanner.
Use the tool’s synthetic example first where available. The example here explains a decision; it is not a reported benchmark result.
Before you call it done.
- Keep the original HEIC if you need HDR, depth information or a Live Photo companion.
- Multi-page TIFF exports only its first page in this release.
- Metadata and original colour profiles are not retained.
- Use rotate/flip for orientation corrections and inspect before sharing.
Know the limits.
Some HEIF brands, high-bit-depth colour workflows and TIFF compression variants may fail. Decoder tests do not certify browser worker delivery or all devices. Code is self-hosted; chosen image bytes are not uploaded.
This tool’s current boundary: Only the first image is exported. HDR depth, auxiliary images, metadata and original colour profiles are not preserved. Maximum 16 million pixels and 20 MB input.
Evidence and scope
Technical source guidance and task-specific output checks. These do not establish that every file, browser or device passes.
Use the checks above on your own exported result. A source explains the format or mechanism; it is not proof that this export preserved every feature.
Technical reference: libheif: HEIF decoder implementation ↗
Choose the right tool for this step.
HEIC to JPEG or PNG
Open an iPhone HEIC photo and export a standard JPEG or PNG locally.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
TIFF to JPEG or PNG
Convert the first page of a TIFF scan to a standard image.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Rotate and flip images
Turn images in quarter-turns or mirror them horizontally or vertically.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Image brightness and contrast
Adjust dark photos with measured brightness and contrast controls.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Resize and crop
Crop and resize images without stretching their proportions.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Preparation tools process locally. Official service links take you to the authority’s website. Inspect any exported copy before sharing it.