LINE Sticker Kit

When this helps

You want to make LINE stickers but keep failing the spec

What it does

Turns artwork you already have into a LINE sticker set ready to submit. Size, padding, transparency, the main and tab dimensions — everything that gets you rejected is handled here. Animated stickers are supported too, and can be built from video.

The fixes baked into this kit

1. ★Actually rejected with "the inside of the illustration is transparent"Key out the green background by colour and the greenish areas inside the character get removed too, leaving pinholes you cannot see by eye. This kit only removes green that connects to the outside edge, which kills that failure.
2. Copyright is 50 characters, alphanumeric only — Japanese is rejectedOne of the places the form trips you up. Together with creator name (50), title (40) and description (160), the flow checks lengths before you type them in.
3. Both dimensions must be even numbersThe 320×270px limit is well known; that odd numbers are rejected is not written down anywhere. The zip tool checks automatically.
4. Animated stickers take no padding — the opposite of still onesCarry the still-sticker habit over and you get rejected. Without knowing it is reversed, you can resubmit forever without understanding why.
5. Playback is 4 seconds including the loopMeasure a single pass and you will think you passed. The loop counts.
6. Get 8 through first, then go to 24Submit 24 at once and a rejection tells you nothing about which one caused it. The flow gets one set of 8 through first.
7. Payout details (bank account, tax) are registered separately from reviewPass review without them and you still cannot receive sales. It is on the submission checklist.

What's inside

• The flow (art → text → review → submit)
• Tools that force the spec
• A screen to look at results and pick
• Submission zip (main and tab included)
• Where the submission form trips people up
• Why reviews fail, and how to avoid it

The first three decisions

1. The character
2. How many (start with 8)
3. Animated or still

What you need

• Extra costA way to produce artworkYou need character art. Your own image AI or existing illustrations both work.
• Extra costA video AI, if you want animated stickersNot needed for still stickers.
• No extra costA LINE Creators Market accountRequired to submit (the account itself is free).

How to use

Just paste this into your AI.

I want to use the nice to have kit "LINE Sticker Kit". Follow https://nicetohave.app/en/g/Y5KMQW22-•••••••••• and set it up.

Works the same in Claude Code or Codex.
Read what this tells your AI to do, before you paste it

FAQ

How many stickers do I get from one video?

Each video packs in about ten motions (roughly 1.5 seconds each), so 60 motions means six videos. When converting, always say how many motions you put in each video: on a solid green background, the software can't find the cuts on its own.

Can I add text or speech bubbles?

There is no way to add text afterwards. If you really want it, put it into the artwork when you make the video. We recommend going without text and making the motion bigger instead, which also lets people outside Japan use the stickers as they are.

Can I use a green or whitish character?

Avoid green. It gets removed along with the green background and leaves holes in the body. For a white character, switch to a dark background on the selection screen and check that the outline still shows.

How should I order the stickers?

The first one becomes the face of the set (the image shown for it in listings), so pick the one that most feels like the character. Put everyday ones such as replies, greetings and thank-yous near the front, and don't place similar designs or motions next to each other.

Is approval guaranteed?

No. The kit matches the technical spec automatically, but a reviewer judges the artwork itself. Review takes a few days; if you're rejected you get a reason, and showing it to your AI as-is lets you fix and resubmit.

Supporters

Once support opens, the people who backed this kit will be listed here.