JusTalk Sticker Creator Guidelines

File	Quantity	Dimensions
Sticker images	At least 12 stickers per pack	Provide each sticker in both 360 × 360 px and 160 × 160 px
Sticker pack cover	1 cover image	Provide the cover in both 360 × 360 px and 270 × 270 px

Both static and animated stickers must meet the following requirements:

• File format: WebP
• Background: Transparent
• Color space: RGB
• Maximum file size: 1 MB per file
• Maximum ZIP file size: 50 MB
• Arrange the stickers in the order in which you would like them to appear in JusTalk.

Content	Character Limit
Sticker pack title	Up to 40 characters
Sticker pack description	Up to 200 characters

• Full-width characters count as two characters.
• Emoji may be used.

Both static and animated stickers must meet the following requirements:

• Maintain consistent character designs, illustration styles, and color palettes throughout the sticker pack.
• Each sticker should clearly convey an emotion, action, or conversational meaning.
• Avoid creating multiple stickers that express nearly identical meanings.
• Make sure facial expressions and key actions remain clear and recognizable when the sticker is displayed at a smaller size.
• Leave adequate space between the main subject and the edges of the canvas to prevent important elements from being cropped.
• Stickers must not be blurry or contain noticeable jagged edges, unwanted white or black edge halos, watermarks, or transparent-edge artifacts.
• If a sticker contains text, only English is currently supported. The text must be clear and legible and must not cover the main character or subject.

We recommend prioritizing content that is useful in everyday conversations, such as greetings, thanks, apologies, responses, happiness, sadness, surprise, encouragement, congratulations, and farewells.

If you create animated stickers, they must also meet the following requirements:

Item	Requirement
Animation duration	Each animation must be no longer than 3 seconds
Frame rate	18 FPS is recommended
Action design	A complete animation should contain one or two main actions
Looping	The animation must loop seamlessly, with a natural transition between the first and last frames and no noticeable frame jumps
Playback experience	Movements should be smooth and natural, with an appropriate pace that is neither too fast nor too slow
Source asset resolution	Imported source assets must be at least 360 × 360 px

Production recommendations:

• Use vector assets or high-resolution PNG files whenever possible to ensure clear exported results.
• Use clear color blocks and relatively bold lines, and avoid excessive fine lines or complex gradients.
• Minimize unnecessary frames, layers, and complex animation effects while maintaining the intended animation quality.
• Avoid flashing, rapid flickering, or other effects that may negatively affect the viewing experience.

Cover	Static Sticker	Animated Sticker	Sticker Pack Title and Description

Leave adequate space between the sticker subject and the edges of the canvas. Adjust the spacing according to the subject’s movement and the visual balance of the composition.

Example
Recommended: The main subject is appropriately sized. The visual weight is well balanced. The character’ s face and actions are fully visible. The sticker remains easy to recognize when displayed at a smaller size.

• Stickers that are useful in everyday conversations and communication
• Stickers with clear, easy-to-understand expressions, messages, and visuals

Examples

• Stickers that only show objects or scenery without conveying a clear conversational meaning
• Stickers with subjects that are too thin, too small, or overly detailed to remain recognizable when displayed at a smaller size
• Stickers with poor visual clarity, such as those with overly light colors or insufficient contrast, or stickers consisting only of numbers with no clear conversational meaning
• Stickers containing illegal content, sexual innuendo, violence, hatred, racial discrimination, or content that encourages minors to drink alcohol or smoke

Examples

Type	Rules	Correct Examples	Incorrect Examples
Sticker pack folder name	Must be unique Lowercase letters (a-z) and numbers (0-9) are supported. Chinese characters, spaces, uppercase letters, and special characters are not supported. Keep the file name short and clear.	cat、panda、lovely、lovely02	Cat 01、猫咪01、Cover_cat
Cover file name	Must be unique Lowercase letters (a-z) are supported. Chinese characters, spaces, uppercase letters, and special characters are not supported. Keep the file name short and clear. The cover name must match the sticker pack name.	cat、panda、lovely	Cat 01、猫咪01、Cover_cat
Individual sticker file name	Each name must be unique within the pack. Lowercase letters (a-z) are supported. Chinese characters, spaces, uppercase letters, and special characters are not supported. Keep the file name short and clear.	smile、love、lovely	Cry01、Cry02

Place each file in the corresponding directory:

File Type	Dimensions	Location	Example
Sticker file	360 × 360 px	Sticker pack root directory
	270 × 270 px	thumbnails/
Cover file	360 × 360 px	cover/
	160 × 160 px	cover/thumbnails/

All sticker files must be placed in their corresponding directories.

Download the submission template:

JusTalk reviews submitted sticker packs based on content quality, usability, technical specifications, content safety, and copyright risk.

Submitted works should meet the following requirements:

• The stickers should be suitable for use in chats and everyday communication.
• Each sticker should convey a clear and easy-to-understand meaning.
• The characters, visual style, and quality should remain consistent throughout the sticker pack.
• Images should be clear and complete and remain recognizable when displayed at a smaller size.
• The pack should not contain excessive duplicate or near-duplicate stickers or stickers with no practical use in conversations.

Stickers featuring objects or scenery are not automatically prohibited. Elements such as coffee, gifts, cakes, and hearts may be submitted if they clearly communicate an emotion, status, or congratulatory message.

The following content may not pass review:

• Illegal content, pornography, explicit sexual innuendo, excessive violence, or dangerous behavior
• Hatred, discrimination, harassment, insults, gambling, politically sensitive content, or content inappropriate for minors
• Content that encourages minors to smoke, drink alcohol, or engage in other inappropriate behavior
• Advertising, promotional dates, QR codes, contact information, watermarks, or content that directs users to external platforms or services
• Unauthorized brands, logos, event marks, or sports team marks
• Unauthorized characters from films, television, animation, or games, or unauthorized images of celebrities, influencers, or other individuals
• Names or imagery associated with other communication apps, social platforms, or similar services
• Content that directly copies, misappropriates, or closely imitates another person’s work
• Fonts, templates, images, or other materials of unknown origin or used without valid authorization
• Stickers that are blurred, too light in color, insufficiently contrasted, or difficult to recognize at a smaller size

Submitted works must be the creator’s original work, or the creator must have obtained lawful, complete, and valid authorization to submit and license them.
If a submitted work includes any of the following, the creator must disclose this information when submitting the work:

• Third-party assets, fonts, images, or templates
• AI-assisted or AI-generated content
• Work created jointly by multiple creators
• School projects, company projects, commissioned works, or works created as part of employment

JusTalk may request source files, evidence of the creation process, proof of authorization, or information about the source of any materials used. Works without sufficient proof of rights may not pass review or be published.
For details about copyright ownership, licensing, permitted uses, the no-revenue-sharing arrangement, and related responsibilities, please refer to: JusTalk Sticker Creator Copyright and Licensing Terms

• Submitting a sticker pack does not guarantee that it will be selected or published.
• If revisions are required, JusTalk will provide feedback explaining what needs to be changed.
• Revised works must be submitted for review again.
• Works with technical issues, content risks, or copyright risks may be rejected.
• Selected works may still be adjusted or removed based on product requirements, operational needs, compliance requirements, or user feedback.

• Static stickers: Figma, AI-assisted illustration tools, and similar tools
• Animated stickers: Adobe After Effects (AE), AI-assisted animation tools, and similar tools

You can use the tool below to convert your files to WebP and optimize file size while maintaining image quality:

https://ezgif.com/maker

How to Use the Tool

 

Step	Example	Instructions
Upload files		Step 1: Select WebP from the top navigation menu. Step 2: Select the source file format that you want to convert to WebP. Step 3: Select the file or files that you want to convert. Step 4: Click Upload XXX to upload the files.
Configure WebP export settings		Step 1: Adjust the WebP export settings as needed. This step is optional. Lowering the Quality setting can reduce the file size, but it may also reduce image clarity. Step 2: Click Convert to WebP to begin converting the files to WebP.
Save the WebP file		Click Save to download the WebP file to your device.