Type plain text. Get real Unicode. Paste where there is no button.
Use this subscript generator to turn H2O or CO2 into H₂O and CO₂ you can paste into WhatsApp, Docs, or slides. The output is a real character from the Unicode Superscripts and Subscripts block (U+2070 to U+209F chart), not a font trick that dies on copy.
Formula mode lowers only digits after letters. Full mode converts the whole input. Need raised exponents or tiny bio letters? Use Superscript or Small Text in the top nav (or on this tool).
Start below. Type CO2 or H2O, copy, and paste once.
For exponents (x², m²), the chip switches to Superscript automatically. For chemistry (H₂O), it uses Subscript + Formula mode.
No data stored • 100% client side • Works offline
Subscript, superscript, and small text use real Unicode characters (₀ to ₉, ₐₑₒ…). Bold and Italic checkboxes only work when pasting into Word and Google Docs. They do NOT work in social media or .txt files. For chemistry formulas like CO₂, use Formula mode with Numbers Only: On.
Clipboard access was denied
To allow copy (and paste with formatting in Word/Docs): click the lock or info icon in the address bar → Site settings → Clipboard → set to Allow. Then try Copy to Clipboard again.
How does this tool turn plain text into Unicode?
You type normal letters and digits. The tool maps supported characters to the Unicode Superscripts and Subscripts block so the result is real text, not a font style. Digits use U+2080 to U+2089. Many letters exist in the same block, but the set is incomplete (see the Unicode names list). Formula mode lowers only digits after letters. Full mode tries to convert the whole string.
Unicode copy paste: does subscript survive WhatsApp and Docs?
Word and Google Docs can apply subscript as formatting. That look often breaks when you paste into WhatsApp, email, or a slide text box. Unicode copy paste keeps the lowered digit as a character, so one copy usually survives chat and Docs on modern devices. Microsoft documents Word’s own subscript command for files that stay in Word. Use that when you never leave the file. Use Unicode when you must paste out.
| Method | Stays in Word | Survives paste to chat/slides |
|---|---|---|
| Word/Docs Subscript button | Yes | Often breaks |
| Unicode from this tool (H₂O, CO₂) | Yes | Yes on modern devices |
| Smaller font only | Sometimes | No |
How do you write chemistry formulas like H₂O and CO₂?
Type plain H2O or CO2. Turn on Formula mode and Numbers Only: On. Only the digits after letters drop below the line. Element symbols stay normal. That matches how teachers write molecular formulas in worksheets and chat. For a ready tap board, open the chemistry formula copy board.
- H2O → H₂O
- CO2 → CO₂
- C6H12O6 → C₆H₁₂O₆
Which letters have no Unicode subscript?
Unicode defines subscript digits and many letters, but not every letter. There is no dedicated subscript b, f, or q in the common set. This tool leaves those letters normal and converts what exists. For B₁-style notation, type B1 with Formula mode instead of expecting a subscript b character. HTML <sub> is markup for web pages. It is not a portable character you can paste into WhatsApp the same way.
What is the difference between subscript and superscript?
Subscript sits below the baseline (H₂O, x₁). Superscript sits above (x², footnote ¹). Pick Subscript or Superscript on the tool before you copy. Full side-by-side table: below vs above the line.
How to use this tool in four steps
- Choose Subscript + Formula mode for chemistry (H2O → H₂O). Use Full mode for whole-word subscript.
- Type or paste plain text in the input box, or tap a quick example chip.
- Copy the Unicode output from the panel.
- Paste into Word, Google Docs, PowerPoint, WhatsApp, or email. Optional Bold/Italic applies in Word and Docs only.
Runs in your browser. No signup. Works offline after the first load.
Subscript numbers 0 to 9
These are Unicode digits U+2080 to U+2089. Click any cell to copy. Need the full board with codes? Use the one-click subscript digits page.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|
| ₀ | ₁ | ₂ | ₃ | ₄ | ₅ | ₆ | ₇ | ₈ | ₉ |
Frequently Asked Questions
What does this tool do?
It turns plain text into Unicode subscript you can paste into Word, Google Docs, or chat. It runs in your browser as a maker and converter. No signup.
How do I write H2O or CO2 in subscript?
Type H2O or CO2. Select Formula mode with Numbers Only on. Copy. Paste H₂O or CO₂ into your document or message.
How do I paste into WhatsApp?
Generate here, tap Copy, paste in the message field. WhatsApp has no subscript button. Unicode shows on modern phones.
Why is there no subscript b or f?
Unicode has no common subscript b, f, or q. Use B1 with Formula mode for B₁, or Word formatting for rare letters that must stay in Word.
Does paste work in Google Docs?
Yes. Paste from this tool works in Docs. Bold and Italic checkboxes apply when pasting there.
Are these real Unicode characters?
Yes. Output uses the Subscript range such as U+2080 to U+209C. Real characters, not images or CSS tricks.
Is it free?
Yes. Free, browser-based, works offline after first load.
Should I use Word formatting or Unicode?
Use Word or Docs buttons when the file stays in one app. Use Unicode when you paste into chat, email, or slides without reformatting.