Local HEIC workbench

Make iPhone photos usable—without sending the file away.

Convert HEIC and HEIF photos to JPG, PNG, or a real PDF document. File bytes are decoded in this browser; product telemetry is deliberately limited to coarse, non-file events.

Open HEIC workbench Inspect an unknown file

No account or file upload endpoint
Output signature checked
Conservative memory budget

Local processing path

A result you can account for

01InspectRead a bounded header and estimate decoded work before conversion.
02Decode locallyHEIC decoding runs in browser Worker/WASM code where the library supports it.
03TransformApply output, quality, dimensions, background and orientation choices.
04VerifyCheck signature, MIME, extension and browser decodability before download.

Boundary: source EXIF, GPS, capture date and embedded ICC profiles are not preserved by the current HEIC decoder. The workbench says so before conversion.

Four intents, one retained session

Choose an output without choosing your files again.

The four HEIC routes have distinct instructions and limits, while an in-memory workbench keeps selected files available as you switch output.

JPGCompatible photo copiesQuality, background, dimensions, manual orientation, batch naming, individual files or ZIP.Lossy · no alpha PNGLossless raster outputUse PNG when avoiding another lossy encode matters. Source metadata is still stripped by the decoder.Lossless · larger PDFBuild a photo documentOrder, rotate, remove, size and fit pages, then download one PDF or separate documents.Raster pages · no OCR ZIPBounded batch conversionA decoded-work budget, visible estimates, cancellation, per-file retry, and honest device limits.Queue · retry · cleanup

Truth before conversion

A file extension is only a claim.

The detector looks at bounded binary evidence, separates container from image brand, and says unknown when evidence is insufficient.

Open format detector

CLAIMED

vacation.jpg · image/jpeg

Mismatch

Detected container

ISO BMFF

Image brand

avif

Magic evidence

66 74 79 70 … 61 76 69 66

Confidence

High · signature + brand

Illustrative detector state. Real results are generated only from the file selected in your browser and can be copied as a text report.

Verified policy

What survives the browser path?

These outcomes reflect the installed decoder and canvas/PDF encoders—not a preservation promise.

Signal	Output policy	Practical effect
EXIF / GPS / capture date	Stripped	Not copied into JPG, PNG or PDF image content.
ICC / wide gamut / HDR	Not preserved	Browser decode and canvas output may reduce color range.
Orientation	Preview + manual control	Decoder pixels are previewed; rotate/flip can be applied explicitly.
Transparency	Output-dependent	PNG can carry alpha; JPG uses the chosen background.
PDF text	Raster only	No OCR and no selectable text are created.

Inspect, understand, verify

Reference material powered by product code.

Signature referenceMagic bytes, containers, brands, dimensions and animation flags from one shared registry.HEIC / HEIF / AVIFWhy one ISO BMFF container can carry different image brands and capabilities.Metadata privacy checkerLook for EXIF, GPS, capture-date, profile and orientation signals locally.Network verification guideUse browser developer tools to confirm file bytes do not enter an upload request.Open fixture corpusDocumented valid, renamed, truncated, animated, polyglot and adversarial samples.