All tools
Text & Data
Count, compare, and clean text or structured data. Process source content in your browser and copy the result when it is ready.
14 available tools
- Bulk File Renamer | Download a ZIPPreview file names safely in your browser and download renamed copies in a ZIP.
- Case Converter for Developer Naming StylesConvert English text into camelCase, PascalCase, snake_case, and six other naming styles at once.
- Find and Replace Text OnlineFind literal text or regular-expression matches and replace the first occurrence or every occurrence.
- Live Markdown Preview and HTML ViewerWrite GitHub-flavored Markdown beside a live preview and copy the sanitized rendered HTML.
- Auto-Saving Browser NotepadKeep multiple text notes in browser storage and export any note as a UTF-8 TXT file.
- Regex Tester with Match and Replace PreviewTest JavaScript regular expressions with match positions, capture groups, highlighting, and replacement output.
- URL Slug GeneratorTurn titles and phrases into hyphenated or underscored URL slugs with optional Korean character retention.
- Excel & CSV Spreadsheet ComparisonCompare two CSV or XLSX sheets by row position or unique keys and inspect added, removed, changed, and structural differences in your browser.
- Excel & CSV Anonymization and Mock Data StudioChoose exactly which XLSX or CSV columns to change, or create deterministic Korean, English, and Japanese mock spreadsheets.
- Excel & CSV Merge and Cleanup WorkbenchMerge CSV and XLSX sheets by header or position, clean, split, or join selected columns, then download a new file or ZIP.
- Whitespace and Duplicate Line CleanerRemove unwanted whitespace and blank lines, deduplicate and sort lines, or change letter case in one pass.
- Character and Word CounterCount characters with or without spaces, words, sentences, lines, paragraphs, UTF-8 bytes, and reading time.
- Line-by-Line Text Difference CheckerCompare original and revised text with an LCS-based line diff in unified or side-by-side views.
- Extract URLs from TextPull HTTP(S) and www addresses from long text, clean duplicates or tracking parameters, and format the link list.