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 .mts 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 .mts 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.
An .mts file is AVCHD footage as written to a camcorder's memory card, containing H.264 video inside an MPEG transport stream. Sony and Panasonic camcorders from the late 2000s onward filled SD cards with .mts clips, so the extension is familiar to anyone importing family or event video. For this route the practical draw is the transport-stream base survives card errors and interrupted recordings well and h.264 essence is often modern enough to re-wrap without re-encoding — balanced against transport-stream packet overhead makes files larger than the same video in MP4, 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 .mts buys you the transport-stream base survives card errors and interrupted recordings well, which is why it is the better fit for importing camcorder footage into Premiere, Resolve, or Final Cut. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
| Aspect | Animated PNG (.apng) | AVCHD video (.mts) |
|---|---|---|
| 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) | uses 192-byte transport packets, standard 188-byte packets plus a 4-byte arrival timestamp, matching Blu-ray's BDAV layout |
| Strongest at | animated stickers (Apple's iMessage and LINE both build on APNG) | importing camcorder footage into Premiere, Resolve, or Final Cut |
| Weak spot | files grow quickly for long or high-motion animations, where animated WebP/AVIF or video compress far better | transport-stream packet overhead makes files larger than the same video in MP4 |
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 .mts in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if MTS 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 MTS file. Outputs keep the original filename with the .mts extension.
Since apng is lossless-oriented and mts is container-oriented, the conversion preserves the source content exactly as stored; no additional compression pass is applied beyond what .mts 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.
Editing suites and VLC handle .mts directly, while browsers, phones, and many TVs fail to recognize the extension even though they could decode the H.264 inside. Re-wrapping to MP4 usually restores playback everywhere without touching quality.
It depends on the content: uses 192-byte transport packets, standard 188-byte packets plus a 4-byte arrival timestamp, matching Blu-ray's BDAV layout. Convert one representative file first and compare before batch-processing a large set.