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specification

PNG Specification (Third Edition)

The current W3C standard for PNG.

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What the specification defines

The third edition formalises APNG animation, HDR colour and the eXIf metadata chunk.

Identifier
W3C PNG 3rd Edition
Published by
W3C
First published
2025

PNG Specification (Third Edition) scores

Deterministic scores calculated from the structured facts above. Identical facts always produce identical scores.

Overall score

87/100

  • Archiving score

    100
    • it is a current, actively maintained format
    • an official specification document is publicly reachable
    • it is actively maintained and current

    Confidence 37% · evidence coverage 78%

  • AI score

    100
    • an official specification document is publicly reachable

    Confidence 41% · evidence coverage 29%

  • Openness score

    100
    • an official specification document is publicly reachable

    Confidence 41% · evidence coverage 60%

  • Longevity score

    92
    • it is actively maintained and current
    • an official specification document is publicly reachable
    • it is a current, actively maintained format
    • it occupies a niche corner of the ecosystem

    Confidence 38% · evidence coverage 100%

Related to PNG Specification (Third Edition)

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Data quality

Every claim on this page is classified as a verified fact, a derived fact or an assumption.

Overall confidence
90%
Verification status
verified
Last reviewed
2026-08-03
Verified facts
2

2 classified claims backed by 2 sources.

Sources and review status

Review status: verified · confidence 90%

Last reviewed 2026-08-03 (revision 1).

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