Does HEIC to PNG Conversion Lose Quality?

The Short Answer

No — converting HEIC to PNG does NOT lose additional quality. PNG is a lossless format that preserves every single pixel from the decoded HEIC image. However, the original HEIC file itself uses lossy HEVC compression, so there IS some quality loss compared to the camera sensor's original data. Think of it this way: HEIC is lossy (like JPEG), PNG is lossless. Converting HEIC → PNG keeps the quality exactly where it was after HEIC decoding — no more, no less.

How HEIC Compression Works

HEIC uses HEVC/H.265 video compression to encode photos. This is a lossy process that discards some visual information to reduce file size — similar to JPEG, but more efficient. HEVC can achieve the same quality as JPEG at roughly half the file size, or better quality at the same file size. The compression artifacts are different from JPEG's blockiness — HEVC tends to produce smoother degradation that's less visible to the human eye.

How PNG Preservation Works

PNG uses DEFLATE compression, which is lossless — every pixel is stored exactly as decoded. When our converter processes a HEIC file: the HEVC decoder decompresses the HEIC data to raw pixels → then PNG encodes those exact pixels into a PNG file. No pixel data is lost in this process. If the original HEIC had visible compression artifacts, those artifacts are preserved in the PNG output too.

Practical Quality Comparison

Here's what you can expect in terms of quality:

• HEIC at "High Efficiency" setting (iPhone default): Equivalent to JPEG at ~85-90% quality, but at half the file size
• PNG from HEIC: Same visual quality as the decoded HEIC, but file size is typically 3-5× larger than the original HEIC
• JPEG from HEIC: Adds ANOTHER lossy compression step — quality decreases slightly. We recommend 92%+ quality to minimize visible loss

When Should You Use PNG Over JPEG?

Choose PNG (lossless) when: you need to edit the image further and want to avoid generation loss from repeated re-saving; the image contains text, screenshots, or graphics where sharp edges matter; you need transparency/alpha channel support; or you're archiving and want the highest fidelity. Choose JPEG when: you need smaller file sizes for email, sharing, or web upload, and some quality loss is acceptable.