UltKit

GIF to APNG Converter

APNG is an animated PNG: the same frames and timing as a GIF in a format that can hold full color and soft transparency. Convert here when a sticker platform asks for APNG or when you want to edit an animation without the 256-color ceiling.

Image Converter

or drop JPG, JPEG, JPE … files here ·

Max 95 MB per file· Up to 20 files· Deleted after 30 minutes

Output

Files are processed on our servers and deleted after 30 minutes.

How to use this tool

  1. 1

    Add the GIF

    Drop one or more animated GIFs on the upload area, up to 20 files of 95 MB each.

  2. 2

    Resize if a platform asks

    Under Advanced settings, set Resize to Width or Longest side, for example 320 px for a LINE or Discord sticker. Leave it on None to keep the original size.

  3. 3

    Convert and download

    Press Convert to APNG. The file ends in .png and still animates.

Every frame and delay of the GIF is copied into an animated PNG, pixel for pixel, ready for LINE, Discord and every current browser.

Why convert GIF to APNG

GIF dates from 1987, when screens showed 256 colors at most, and its rules still apply: up to 256 colors in a frame's palette and a single color that is either fully transparent or fully opaque. That is why GIF stickers have jagged, halo-ringed edges on a dark chat background.

APNG removes both limits. Each frame is a PNG with up to 24-bit color and an 8-bit alpha channel, so edges can fade into any background. Mozilla proposed the format in 2004 and Firefox 3 played it in 2008; Safari followed in version 8 (2014) and Chrome in version 59 (2017). The W3C's third edition of the PNG specification, finished in 2025, made APNG part of the official standard.

colors per GIF frame
256
colors per APNG frame
16.7 M
APNG alpha vs GIF's 1-bit
8-bit
LINE animated sticker limit
300 KB

GIF

Graphics Interchange Format

GIF was introduced by CompuServe in 1987 and is still the most widely supported format for short, looping animations. It is lossless but limited to a palette of 256 colours per frame, so photos and gradients show banding and dithering. It supports only on/off (1-bit) transparency, which leaves jagged edges on curved shapes. Animated GIFs are often far larger than the same clip as MP4 or WebP. Every browser, chat app and social platform plays GIFs.

Compression
Lossless
Transparency
Yes
Animation
Yes
Introduced
1987 · CompuServe
GIF converter

APNG

Animated PNG

APNG is an extension of PNG that stores several frames to create an animation, proposed by Mozilla developers in 2004. Unlike GIF it supports full 24-bit colour and smooth 8-bit alpha transparency, so animated edges look clean on any background. Older PNG viewers simply show the first frame, which makes the format backward compatible. All modern browsers play APNG, but many editors, messaging apps and social networks still treat it as a static PNG. Files can be large because each frame is stored losslessly.

Compression
Lossless
Transparency
Yes
Animation
Yes
Introduced
2004 · Mozilla
APNG converter

GIF goes to APNG when a sticker store or an app requires animated PNG, or when an animation needs editing beyond GIF's 256 colors and one-bit transparency.

GIF to APNG for LINE and Discord stickers

DoDon't
Resize to 320 px wide before uploading a stickerExpect smoother color from a dithered GIF
Keep LINE stickers between 5 and 20 framesRename .gif to .png and hope it animates
Check the file size against the platform limitSend APNG in email; most clients show one frame
Keep the original GIF for places that need GIFUse APNG for long clips; use video instead

Where an animated PNG plays, and where it freezes

Chrome, Edge, Firefox and Safari all animate APNG in a web page, and LINE and Discord play it in their apps. Many image editors and most email clients read only the default image and show a still frame, which is harmless but easy to mistake for a failed conversion. Open the result in a browser tab to check it.

If an animation will mainly live in chats and email, the GIF is still the safer file; APNG to GIF converts back when a platform rejects the PNG. For anything longer than a few seconds, a video is far lighter: GIF to WebM keeps the loop at a fraction of the size.

GIF to APNG converter questions

Will converting a GIF to APNG improve its colors?

No. The GIF's frames were already reduced to 256 colors, and no converter can bring the lost shades back. The APNG reproduces the GIF exactly, losslessly; what you gain is a file you can now edit, recolor or add soft shadows to without hitting the palette limit again.

Why does the APNG end in .png and not .apng?

APNG was designed to be backward compatible, so it uses the normal PNG extension and MIME type. Software that understands the animation chunks plays it; older software shows the first frame as an ordinary PNG instead of an error.

What are LINE's rules for animated stickers?

LINE Creators Market takes animated stickers only as APNG: at most 320 × 270 px, 5 to 20 frames, up to 4 seconds of playback and 300 KB per file. Resize under Advanced settings and trim long GIFs before converting.

Can I upload an APNG as a Discord sticker?

Yes. Discord server stickers accept APNG files of up to 512 KB and recommend 320 × 320 px. A GIF reaction that is too heavy often fits once it is resized to 320 px and saved as APNG.

Is APNG smaller than GIF?

Sometimes, not always. Both formats compress losslessly and store full frames or changed regions, so flat cartoons often come out a little smaller and noisy, dithered GIFs a little larger. For the smallest animation, GIF to WebP usually wins.