Add your APNG file
Drop one or more .apng files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
Converting a .apng image to .3gp re-encodes the pixels for a different balance of size, quality, and support. Free, private, and validated — the file never leaves your browser.
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.Converting a .apng image to .3gp re-encodes the pixels for a different balance of size, quality, and support. An .apng file is an animated extension of PNG: full 24-bit color with 8-bit alpha per frame, in a stream that plain PNG decoders read as a normal still image. It delivers the smooth, semi-transparent animation that GIF's 256-color palette never could, and it is the format behind many messaging-app sticker packs.
A .3gp file is a lightweight container defined by the 3GPP standards body for video recorded and shared on mobile phones. It packs low-bitrate video and compressed speech with minimal overhead, which made .3gp the format of MMS messages and early camera phones. For this route the practical draw is extremely small files by design and structural kinship with MP4 makes conversion quick — balanced against picture quality is poor by any modern standard, which is worth knowing before you commit a large batch.
The practical trigger for this conversion is usually a mismatch: with .apng, files grow quickly for long or high-motion animations, where animated WebP/AVIF or video compress far better. Switching to .3gp buys you extremely small files by design, which is why it is the better fit for recovering videos from old feature phones and their memory cards. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
| Aspect | Animated PNG (.apng) | 3GPP video (.3gp) |
|---|---|---|
| Format type | Lossless — every pixel or sample is preserved exactly | Container — quality depends on the codecs and settings inside |
| How it stores data | adds three chunk types to PNG: acTL (animation control), fcTL (frame control), and fdAT (frame data) | iSO base media structure like MP4, but with a deliberately restricted codec list |
| Strongest at | animated stickers (Apple's iMessage and LINE both build on APNG) | recovering videos from old feature phones and their memory cards |
| Weak spot | files grow quickly for long or high-motion animations, where animated WebP/AVIF or video compress far better | picture quality is poor by any modern standard |
Drop one or more .apng files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
Select .3gp in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if 3GP is selectable, the route is real and validated.
Press Convert. Decoding and re-encoding happen on your device using the browser's native image pipeline and hand-tuned encoders.
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid 3GP file. Outputs keep the original filename with the .3gp extension.
Since apng is lossless-oriented and 3gp is container-oriented, the conversion preserves the source content exactly as stored; no additional compression pass is applied beyond what .3gp itself requires.
Yes — the .apng file is processed inside your browser tab and never uploaded. Decoding and re-encoding happen on your device using the browser's native image pipeline and hand-tuned encoders. Close the tab and the file is gone from memory.
Android still opens most .3gp files, and desktop players such as VLC handle them, but iOS and web browsers generally do not. Because the codecs inside are dated, converting to MP4 with AAC audio is the standard path to modern playback.
It depends on the content: iSO base media structure like MP4, but with a deliberately restricted codec list. Convert one representative file first and compare before batch-processing a large set.