What the checker does
Paste any styled text, from a bio, a username, a message or one of the style cards here, and the checker identifies which style it is by matching the characters against every style table. It then lists every test result recorded for that style: platform, field, whether it passed, showed boxes, was stripped on save, or was accepted but broke search, together with the device and the date. While no device round has been recorded, the checker identifies the style and returns the plain text.
Where the results come from
The compatibility matrix is filled by hand: each style is pasted into each field on real devices (Instagram bio and username, TikTok bio, Discord nickname, X name and bio, WhatsApp name and about, and the operating systems' own text fields on iOS and Android) and the outcome recorded with the device and the date. Platforms change their filters without notice, so a row is only as current as its date.
Reading a verdict
Pass means the text saved and displayed as styled. Shows boxes means the platform accepted it but the device font lacked the glyphs, so other users may see squares. Stripped on save means the platform's filter removed the styling. Accepted, breaks search means it displays but searching for the plain name no longer finds it, which matters for usernames.
If your style fails
Switch to Bold Script or Bold Italic, whose character ranges have no gaps and pass most often, or use a font image where the platform allows images. The platform pages give the paste steps for each field.
Checking before you paste
The fastest workflow is to copy a style from the homepage, paste it here, and read the row for the field you care about before you touch your profile. Usernames are the strictest fields everywhere; bios and captions the loosest. If a row you need is missing, the style has not been tested in that field yet and the safe assumption is that it may be stripped.