How this instrument works
The same 2001 Unicode addition that gives bold and script alphabets their own code points does the same for italic: a slanted A-Z and a-z with no connection to font-based italic formatting. Because each letter is its own character rather than a style applied to the ordinary letter, italic text made this way keeps its slant wherever plain text lands, including places with no italic button at all — bios, usernames, chat apps, plain-text notes.
Italic is the cleanest of the three alphabet styles in this batch, with a single exception. Lowercase h has no slot in the U+1D434 block; instead it reuses ℎ (U+210E), a character Unicode had already assigned for the Planck constant in physics notation, long before the italic alphabet was built. Visually it's indistinguishable from the rest of the italic set — a slanted h — but to a computer comparing characters, it's a different code point from its twenty-five neighbours. There's also no digit range for italic, matching script's limitation: numbers pass through unconverted.
- Type or paste your text — up to 2,000 characters.
- Read the italic result as it updates with every keystroke.
- Copy it and paste it anywhere plain text is accepted.
- Numbers won't convert — italic has no digit range in Unicode, so digits pass through exactly as typed.
Worked example — the hidden hole in "hello world"
Typing hello world into the box returns ℎ𝑒𝑙𝑙𝑜 𝑤𝑜𝑟𝑙𝑑 — read it and every letter looks consistently slanted, but the very first character isn't built the same way as the other nine. The lowercase h converts to ℎ, U+210E, a character Unicode reserved for the Planck constant back when the corners of the standard used for physics and engineering notation were being filled in. Every other letter here — e, l, o, w, r, d — maps through the italic block's own offset formula starting at U+1D434 and U+1D44E.
This is the one letter in the whole italic alphabet that behaves differently, and it matters if you're comparing pasted italic text against the original by character rather than by eye: a search for the plain letter "h" won't match ℎ, even though nobody reading the rendered text would ever notice a difference.
Questions
Why does the letter h look slightly different from other converted letters?
It doesn't look different to the eye — it's built differently in Unicode. Lowercase h has no code point of its own in the Mathematical Italic block (U+1D434), because that position was reserved and never filled; instead it reuses U+210E, a character Unicode had already assigned decades earlier for the Planck constant in physics notation, which happens to be a slanted h. The rendered glyph matches the rest of the italic set exactly; only a character-level comparison shows the difference.
Does this convert numbers to italic too?
No. Unicode never assigned a digit range to the Mathematical Italic style — bold has one (starting at U+1D7CE), italic and cursive don't. Type 5k into this tool and the 5 stays a plain 5 while the k converts to 𝑘; that's not a bug, there's simply no italic-styled Unicode character for any digit. The bold text tool on this site is the one alphabet here with digit support.
Is this the same as pressing Ctrl+I or writing *italic* in Markdown?
No, and the difference matters. Ctrl+I and Markdown asterisks apply formatting to the existing letter A; this tool swaps A for an entirely different Unicode character, 𝐴. Real formatting is accessible, searchable, and editable by any word processor; Unicode italic text is none of those things, but it works in places — bios, usernames, plain-text fields — where real formatting isn't available at all.
Will this italic text display correctly on every device?
Nearly everywhere, but not with total certainty. Rendering needs font support for the Mathematical Alphanumeric Symbols block, which almost every current phone, browser, and app includes. A handful of older devices or restricted font environments may show a blank box for these characters instead of the intended slanted letter, particularly for the hole character ℎ, which lives in a different, less commonly supported block.
Can I convert this italic text back to plain text?
Not with this tool — it only encodes plain text into italic Unicode, one direction only, with no built-in decoder. To reverse it you'd need to map each italic character back to its plain-text letter by hand or use a separate decoding tool, so keep your original text saved if you might need it again later.