Document & text tools

Convert Markdown and CSV, compare text, clean data.

9 tools

• Markdown to HTML

  Convert Markdown (GitHub-flavoured) to clean HTML with a live preview. Copy or download the result, entirely in your browser.

• HTML to Markdown

  Convert HTML to tidy Markdown, including tables, lists and code blocks. Scripts and styles are dropped. Runs in your browser.

• Text Diff Checker

  Compare two texts side by side and see added and removed lines, words or characters. Copy the result as a unified patch.

• Word Counter

  Count words, characters, sentences and paragraphs, estimate reading and speaking time, and see top keywords. Works for Chinese, Japanese and Thai too.

• Case Converter

  Convert text to UPPER, lower, Title, Sentence, camelCase, snake_case, kebab-case and more. Unicode-safe, with language-specific casing.

• Remove Duplicate Lines

  Delete duplicate lines from a list, keep the first or last occurrence, ignore case, trim spaces and sort. See how many were removed.

• CSV to JSON Converter

  Convert CSV or TSV to JSON in your browser. Auto-detects the delimiter, handles quotes and BOM, and previews the first rows.

• JSON to CSV Converter

  Convert a JSON array of objects or arrays to CSV. Flattens nested objects with dot notation, with custom delimiter and spreadsheet-safe export.

• CSV Cleaner

  Clean CSV files: trim spaces, remove empty and duplicate rows, tidy column names, filter, sort and drop columns. See exactly what changed.