You find the perfect reaction — a small animated character doing exactly the right thing — send it to a group chat, and it arrives as a blurry square, or a frozen still, or with a white box around the edges.
Nothing went wrong on your end. The three things people call stickers are different file formats with different rules, and the chat app decides what happens to them on the way.
Once you know which is which, choosing takes about a second.
Three different things get called a sticker
A GIF is an animated image file, and an old format. Each frame is limited to 256 colours, and transparency is a single on-or-off flag per pixel with nothing in between. It usually plays automatically, loops, and carries no sound. Almost anything can open one.
A sticker, in the iPhone sense, is something else. Since iOS 17 there is a Stickers drawer inside the emoji keyboard, holding stickers from Messages apps, Memoji, and cut-outs you make yourself from photos. Because they live in the keyboard, they work in most places you can type.
Platform stickers are a third category. WhatsApp and Telegram run their own sticker systems, with their own formats and packs, added inside those apps rather than from the iOS keyboard.
And then there are plain images: a PNG or JPEG sent as a photo. Static, sharp, no surprises.
Why a GIF sometimes arrives as a video or a still
Several apps quietly convert a GIF into a short silent video, because video compresses far better at the same quality. It usually looks and loops the same, but if you save it you get a video file rather than a GIF.
Some desktop email software shows only the first frame of an animated GIF. If you are sending one by email, make sure the first frame carries the joke on its own.
A message to a phone that is not on iMessage falls back to the older MMS route, which compresses hard — that is where blurry arrivals come from. On iOS 18 and later, iPhones can use RCS instead where your carrier and the receiving phone both support it, and RCS handles media considerably better. Whether you get it depends on the carrier, so results in a mixed group vary.
Transparency, and the white box problem
If a cut-out shape turns up with a white rectangle behind it, or a hard jagged fringe, you are almost certainly looking at a GIF.
GIF transparency is one bit per pixel: fully visible or fully gone. A soft anti-aliased edge cannot be stored, so it gets snapped one way or the other, or baked against whatever background colour the file was saved on. That is the halo you see.
PNG and WebP store partial transparency, so edges stay soft against any bubble colour, light or dark. If you want a shape that sits cleanly on a coloured background, you want a sticker or a PNG, not a GIF.
Matching the format to the chat
In iMessage between iPhones, anything works. Stickers are the nicest option because you can attach one to a specific message rather than to the conversation.
In a mixed group with Android phones, favour simple, bold images. Fine detail and small text are the first casualties of compression, unless RCS is in play.
In WhatsApp, stickers are the local currency. A GIF sent there usually arrives as a looping video.
In Instagram, Discord and Slack, GIF search is built in, and static images work well as reactions.
In work chat, static beats animated. An animation loops forever in the scroll-back, and someone will read that thread three days later.
In email, send a static image or a link. Animation support is inconsistent across mail clients.
Where to keep the ones you actually reuse
A small sorted set beats a large unsorted one.
Saved GIFs land in Photos and gather in the Animated album; marking the handful you use as favourites makes them findable. The iOS sticker drawer keeps a recents row, which does most of the work if you reuse five or six.
If you would rather not hunt through screenshots, an app that sorts them by category does the filing for you. Kawaii Keyboard & Wallpapers groups its GIFs that way alongside the keyboard theme, so what you send matches the keys you sent it from.
Drop a sticker onto one specific message
In Messages on iOS 17 and later, open the emoji keyboard, switch to the Stickers tab, then press and hold a sticker and drag it onto a message bubble instead of tapping send. It sticks at the angle and position you let go, which turns a general reaction into a reply to one exact line. Press and hold a placed sticker to move or remove it.
A few small courtesies
One per exchange. A wall of animation is hard to read past, especially for whoever scrolls back later.
Avoid fast flashing or strobing content. Reduce Motion does not stop an animation playing inside a chat, and rapid flicker is unpleasant to look at and unsafe for some people.
Watch the weight on a metered plan. Animated files are heavier than static ones, and a chat full of them downloads every time you open it.
Quick answers
How do I save a GIF someone sent me?
In Messages, press and hold the GIF and choose Save. It goes into Photos, in the Animated album. If the sender's app converted it to video on the way, you will get a video file instead, which plays fine but cannot be passed on as a GIF.
Can I make a sticker from my own photo?
On iOS 17 and later, open a photo, press and hold the subject until it lifts away from the background, then choose Add Sticker. It joins your sticker drawer and becomes available from the emoji keyboard in other apps, not just in Messages.
Why does my sticker look blurry?
Either the source image was small and got scaled up to fill the space, or it went through MMS compression on the way to a non-iMessage phone. Start from the largest version you have, and expect softness in mixed groups.
Do stickers work outside Messages?
Mostly. Anything that shows the standard emoji keyboard can usually accept them, and they arrive as images. Some apps handle that neatly, some paste them as an attachment, and a few refuse them, so test once before relying on it.
Where to get it
If your current collection is a folder of screenshots you cannot search, Kawaii Keyboard & Wallpapers keeps cute GIFs sorted into categories next to a matching pastel keyboard, which is a faster way to find the right one mid-conversation than scrolling your camera roll.
Pick a handful you would actually send, learn where they live, and leave the rest alone.