Slack emoji guides and tools
Everything about making a custom Slack emoji: the exact size, formats, animated GIFs and how to add the result to your workspace.
Free converters
- Slack emoji sizeThe Slack custom emoji size is 128×128 pixels and 128 KB at most. See every requirement and resize any image to fit in seconds, free and in your browser.
- Resize image for Slack emojiResize and crop any image to a 128×128 Slack emoji under 128 KB. Pick the square, download a PNG or GIF. Free, no signup, and nothing is uploaded.
- PNG to Slack emojiConvert a PNG to a Slack emoji: crop a square, get a 128×128 PNG under 128 KB with transparency kept. Free, no signup, runs in your browser.
- JPG to Slack emojiTurn a JPG or JPEG photo into a Slack emoji: crop a square and get a 128×128 PNG under 128 KB. Free, no signup, and your photo stays in your browser.
- GIF to Slack emojiConvert any animated GIF to an animated Slack emoji: crop a square, get a 128×128 GIF under 128 KB. Free, no signup, and your GIF never leaves your browser.
- Transparent Slack emojiMake a Slack emoji with a transparent background: use a PNG or GIF with transparency and convert it to 128×128 under 128 KB. Free, in your browser.
Guides
- Make an animated Slack emojiStep-by-step guide to make an animated Slack emoji from a GIF: size, frames, 128 KB limit, and how to shrink a heavy GIF so Slack accepts it.
- Add a custom emoji to SlackAdd a custom emoji to Slack in a minute: prepare a 128×128 image under 128 KB, upload it from the emoji picker, name it and use it. Fixes common errors.
- Slack emoji too bigSlack says your emoji is too large? Learn why and how to get a custom emoji under 128 KB and 128×128 pixels: crop, resize and reduce colours or frames.