Drew or generated your pictures but keep failing the upload? This tool fits them to the LINE Creators Market specs: it trims, removes the background, adds a white outline, names the files 01.png, main.png and tab.png, and checks every rule before you can download the ZIP. It runs in your browser and uploads nothing.
LINE accepts sets of 8, 16, 24, 32, 40 images.
Preparing…
PNG · JPG · WebP · HEICFree: sticker and emoji sets up to 16 images · Pro: 24/32/40 sets and animated
Processed on your device, never uploaded · up to 20 MB per picture
Pictures are never uploaded; everything happens in your browser. This tool is not affiliated with LINE.
Preparing…
Add pictures and we will trim, resize, make the background transparent, name them 01.png, 02.png… and create main.png and tab.png.
Checked against the LINE Creators Market guideline pages on 2026-09-30. The table and the rule checker read the same data.
| Rule | Sticker | Emoji | Animated sticker | Animated emoji |
|---|---|---|---|---|
| Image size (px) | up to 370×320 | 180×180 | up to 320×270 | 180×180 |
| Images per set | 8, 16, 24, 32, 40 | 8–40 | 8, 16, 24 | 8–40 |
| File type | PNG | PNG | APNG (.png) | APNG (.png) |
| File size per image | 1 MB | 1 MB | 1 MB | 300 KB |
| Total ZIP size | 60 MB | 20 MB | 60 MB | 20 MB |
| Main image main.png | 240×240 | none | 240×240 APNG | none |
| Chat icon tab.png | 96×74 | 96×74 | 96×74 | 96×74 |
| Other | even width and height · about 10 px margin | — | one side at least 270 px | — |
| Animation | — | — | 5–20 frames · 4 s in total at most · 1–4 loops | 5–20 frames · 4 s in total at most · 1–4 loops |
All types: transparent background, RGB colour mode, at least 72 dpi. Sources: stickers,emoji,animated stickers,animated emoji.
Register and sign in at LINE Creators Market, open My Stickers and create a new set, fill in the title, description and copyright, choose the number of images, and upload the ZIP from this page. LINE reviews every submission before approval; read its review guidelines.
The checker confirms size, file type, transparent background, margin, file size, image count, file names and the animation rules. LINE reviews content, copyright and suitability itself (no advertising, no characters or logos you do not have rights to, and so on), so passing this checker does not guarantee approval.
A white outline of 0–12 px keeps the character visible on light and dark chat backgrounds; the preview shows both. Trimmed artwork gets about 10 px of space, as LINE suggests. Drag pictures to reorder them (file names follow the order) and pick the most recognisable one for main.png and tab.png.
Free makes still sticker and emoji sets of up to 16 images at full quality with no watermark. iToolers Pro adds sets of 24, 32 and 40 and animated stickers and emoji (APNG), still on your device.
Convert iPhone photos with HEIC to JPG, shrink files with Compress Image, or size product pictures with Marketplace Image Sizes.
LINE is a trademark of LY Corporation. iToolers is not affiliated with, endorsed by or sponsored by LINE or LY Corporation, and does not use the LINE logo. “For LINE Creators Market” only describes the file specification.
Still stickers: each image at most 370×320 pixels with even width and height, PNG, transparent background, no more than 1 MB each, and about 10 px of space between the trimmed artwork and the image edge. A set holds 8, 16, 24, 32 or 40 images, plus a 240×240 main image and a 96×74 chat icon. Emoji are 180×180 pixels, 8–40 per set. This tool fits your pictures to every one of these rules (checked against LINE's guideline pages on 2026-09-30).
The usual technical causes are an image over 370×320 or with an odd width or height, a background that is not transparent (still white, for example), a count that is not 8/16/24/32/40, wrong file names, a file over 1 MB, or an animation whose frames are all identical. The checker on this page tests each of these before you can download. LINE also reviews the content, copyright and suitability of every sticker itself; this tool cannot check that or guarantee approval.
If your drawing sits on one flat colour such as white, choose “Remove a solid background automatically”. The tool finds the background colour from the picture edge and removes only what touches the edge, so the white of the eyes or teeth inside the character stays. Edges are soft with no white fringe. Adjust the tolerance, and fix leftover bits with the erase and restore brushes. No AI is involved and it all runs on your device. For a photo with a busy background, cut it out with another tool first and bring in a transparent PNG.
They must be APNG files (extension .png) with 5–20 frames, at most 4 seconds in total (loops × length), 1–4 loops, and the frames must not all be identical. Animated stickers are at most 320×270 with one side of at least 270 px, up to 1 MB each, in sets of 8, 16 or 24. Animated emoji are 180×180, up to 300 KB each. This tool converts GIF, APNG or animated WebP files (or several still pictures) into APNG within these rules, speeds the animation up to fit the time limit and reduces colours when a file is too big. It is a Pro feature.
Stickers are 01.png, 02.png … in order, plus main.png and tab.png. Emoji are 001.png, 002.png … plus tab.png. The tool names the files in the order you arrange them and puts everything at the top level of the ZIP (no folder). Then sign in to LINE Creators Market (creator.line.me), create a new sticker or emoji set, choose the number of images and upload the ZIP, or upload the images one at a time.
Free makes still sticker and emoji sets of up to 16 images at full quality, with no watermark and the complete rule checker. iToolers Pro adds sets of 24, 32 and 40 images and animated stickers and emoji (APNG). Everything is still processed on your device with no upload.
No. Trimming, background removal, resizing and building the ZIP all happen in your browser. Your pictures and file names are not sent to any server, and closing the tab discards everything, so it is safe for artwork you have not published yet.
No. iToolers is an independent third-party tool and is not affiliated with, endorsed or sponsored by LINE or LY Corporation. LINE is a trademark of LY Corporation. We use the name only to say that the output follows the technical rules for LINE Creators Market, which LINE may change. Always check the latest rules at creator.line.me.
