Anvil Tools
Word & Character Counter
Count words, characters, sentences, and estimated reading time as you type.
Open tool →Text Case Converter
Change capitalization for prose, labels, filenames, variables, and URLs while keeping the work entirely in your browser.
Change text case
Compare case styles on one phrase
Try NASA report: café and compare styles. Identifier modes extract letter and number groups and remove punctuation. Automatic title and sentence modes can change acronyms and brand names; review them before publishing.
| Input or check | Expected result or decision |
|---|---|
| camelCase | nasaReportCafé |
| snake_case | nasa_report_café |
| Title Case | Nasa Report: Café; the acronym is not preserved automatically. |
| Sentence case: NASA report: café | Nasa report: café; review the changed acronym. |
How it works
- Paste text and choose the target case.
- Prose modes preserve punctuation and spacing.
- Identifier modes extract letters and numbers, then join normalized words.
Common uses
- Preparing headings and labels.
- Creating variable or CSS class names.
- Normalizing filenames and URL slugs.
Your input stays in this browser. Nothing entered into this tool is sent to the Anvil Tools server.
A practical walkthrough
- Paste a heading or identifier, select a case style, and inspect the converted result before copying it.
- Check brand names, acronyms, and words with special capitalization manually after conversion.
- Use Copy to copy the converted text. Review acronyms, names and punctuation before replacing the original.
Tips for a reliable result
Automatic case conversion does not understand every editorial convention. Keep a copy of the original when changing a large passage.
What to use next
These tools open separately; inputs are not transferred.
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Known limitations
Automatic case conversion is not language-aware editing. Acronyms, proper names, punctuation, locale-specific casing, and identifier conventions may need manual correction.
Related guide and Lab test
Questions and troubleshooting
How does title case handle small words?
This tool capitalizes each word consistently. Editorial title-case rules differ by style guide, so review titles that contain articles, conjunctions, or prepositions.
Does it support non-English text?
Uppercase, lowercase, title, and sentence modes use Unicode-aware browser casing. Identifier modes recognize Unicode letters and numbers.
When converted text needs corrections
Choose the intended transformation and review names, acronyms, and language-specific capitalization. Keep the original text for comparison. Copy failures can be handled by selecting the displayed output manually; capitalization rules do not replace editorial review.
Will it preserve brand names and acronyms?
Automatic case rules can change deliberate capitalization. Review names, acronyms, and headings manually after converting.
Is changing case a translation?
No. The tool changes the presentation of the text; it does not translate meaning or correct grammar. Keep the original when applying changes to a long passage.
Explore practical guides and experiments
Why Filenames Work on One Device but Fail on Another: Safe Naming Across Windows, macOS, and the Web
Why do filenames fail across Windows, Mac, Linux, or websites? Learn about invalid characters, reserved names, case sensitivity, extensions, and safe naming.
Title Case vs Sentence Case: Editing Headlines, Labels, and Text Without Losing Meaning
Learn when to use title case, sentence case, and identifier styles. Edit headings without damaging acronyms, brand names, or technical text.