Tilde strong on this page means combining tilde — the Combining Diacritical Marks character at Unicode U+0303 (COMBINING TILDE). It is a non-spacing mark placed immediately after a base letter to add a tilde above it — common in phonetics for nasalization.
Remember
Character ◌̃ (on base letter)
Unicode U+0303
Hex entity ̃
Decimal ̃
CSS escape \0303
Named entity (none for U+0303)
Not the same ñ · ∼ / ˜
Hex, decimal, and CSS all produce the same combining mark. Write it right after the base letter (ã → ã). Prefer precomposed letters when they exist.
Using Hex Code: ã
Using HTML Code: ẽ
õ (CSS mark on o)
Example: nasal ã
How It Works
1. Hex:U+0303 → ̃ right after a. The browser combines them into ã.
2. Decimal: same code point as 771 → ̃ after e. Same combining mark.
3. CSS: use \0303 in content (not an HTML entity). #point::after appends the mark after o, producing õ.
4. Order: the mark must follow the base letter. There is no named HTML entity for U+0303.
Pitfalls & Tips
Common mistakes when working with Combining Tilde.
Order
Mark after the base
Write ã, not the mark alone or before the letter. Combining marks attach to the preceding character.
˜
Named entity trap
˜ / ∼ produce math U+223C, not combining U+0303. Use numeric forms for the diacritic.
ñ
Prefer precomposed when possible
For ñ, ã, õ, and similar letters, named precomposed entities are clearer and more compatible than base + combining mark.
a̴
Not overlay or below
Overlay (U+0334) goes through the letter; below (U+0330) sits under it. Strong/combining tilde sits above.
Fonts
Diacritic font coverage
Most fonts cover U+0303 well. If stacking looks wrong, try a font with strong combining-mark support.
CSS vs HTML
Do not mix escapes
\0303 belongs in CSS strings. ̃ / ̃ belong in HTML after the base letter.
Compatibility
Browser Support
Combining tilde (U+0303) and its entity forms (̃, ̃, CSS \\0303) are supported in all mainstream browsers. Visible glyphs depend on Combining Diacritical Marks font coverage.
✓ Universal support
Tilde Strong (ã)
Encode with hex, decimal, or CSS escape — place after the base letter for the same combining mark.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+0303 / entitiesFull support
Bottom line: Prefer ̃ or ̃ after a base letter. Use \\0303 only inside CSS content. There is no named entity for U+0303.
Remember
Key Takeaways
Unicode: combining tilde is U+0303 (decimal 771) — “tilde strong” on this site.
HTML: use ̃ or ̃after the base letter — no named entity for U+0303.
CSS: use \0303 inside content to append the mark.
Watch out:˜ ≠ U+0303; prefer ñ when a precomposed letter exists.
One line: base + U+0303 → ã / ã / CSS \0303.
Frequently Asked Questions
Use ̃ (hex), ̃ (decimal), or the CSS escape \0303 in content. Place the entity immediately after the base letter (e.g. ã). There is no named HTML entity for U+0303.
U+0303 (COMBINING TILDE). Hex 0303, decimal 771. It belongs to Combining Diacritical Marks (U+0300–U+036F).
No. HTML5 does not define a named entity for combining tilde. Use numeric forms ̃ or ̃. Note: ˜ maps to U+223C, not U+0303.
Use it for nasalization and other phonetics when you need a tilde above a letter that has no precomposed form. Prefer ñ, ã, etc. when a precomposed character exists.
HTML entities (̃ or ̃) go in markup after the base character. The CSS escape \0303 goes in stylesheet strings (usually content on ::before/::after).
No. U+0303 is a combining mark above a base letter. ñ is the precomposed letter ñ. ∼ / ˜ is the math tilde operator (U+223C).
🤔
Did you know?
Tilde strong on this site means combining tilde (U+0303, decimal 771) — COMBINING TILDE in Combining Diacritical Marks. HTML5 has no named entity for U+0303 — use ̃ or ̃ after a base letter. Prefer precomposed forms like ñ (ñ) when available. Distinct from math ˜ / ∼ (U+223C).
