Case Converter Online
Convert text capitalization with one click between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and kebab-case.
Open ToolConvert article titles and strings into SEO-friendly, clean URL slugs with automatic Vietnamese accent stripping and delimiter controls. The ultimate SEO URL generator, permalink slug creator, and clean URL formatter.

Stop generating slugs one-by-one. Batch process article headlines from spreadsheets directly into your CMS permalinks.
Type your blog post headline, product name, or document title into the input box.
Choose hyphen (-) or underscore (_) separators, and toggle lowercase conversion.
Click the copy button to transfer the slug directly into your CMS or markdown frontmatter.
Follow these search engine guidelines to ensure your permalinks are clean, crawlable, and optimized for maximum organic click-through rates:
| SEO Parameter | Recommended Standard | Why It Matters for Search Engines |
|---|---|---|
| Word Separators | Hyphens (-) instead of Underscores (_) | Google crawler treats hyphens as word spaces (auto-clicker = two words), whereas underscores join words into a single string. |
| Letter Case | Strictly Lowercase (lowercase) | Linux servers are case-sensitive. Mixed cases cause duplicate content and 404 indexing errors. |
| Accents & Diacritics | Stripped to ASCII Latin characters | Prevents messy percent-encoded URLs (e.g. %E1%BA%A3) when shared on social media or external sites. |
| Slug Length | 3 to 5 targeted keywords (30–60 chars) | Short, readable URLs improve user click-through rates (CTR) on Google SERPs and mobile previews. |
Comprehensive diacritics table cleanly transforms accented Vietnamese characters into plain Latin letters for clean URL formatting.
Removes brackets, punctuation, emojis, and symbols that cause broken links or URL encoding issues in search engines.
Preview how your final SEO permalink slug looks dynamically as you type with zero delay.
Switch between hyphens and underscores with custom separator controls, then copy your clean URL slug instantly.
Clear answers about using this tool and automating workflows with RunMacro.
Google's search algorithm officially recommends hyphens over underscores as word separators. Hyphens allow search bots to recognize distinct keywords, whereas underscores treat adjacent words as a single combined term.
Yes. The tool features specialized diacritics mapping for Vietnamese characters (transforming đ to d, ă/â to a, ê to e, etc.) to produce clean, standard ASCII Latin permalinks.
Yes. With the RunMacro Chrome Extension, you can automate bulk article publishing, automated slug generation, and form submissions across WordPress, Ghost, Webflow, and custom web CMS dashboards.
Explore other helpful browser-based utilities in the same category.