Text Tools

Convert Markdown to HTML in your browser with a live preview, side-by-side view, and copy or export options. Processing stays on the page.

Convert HTML to Markdown in your browser while preserving common structure such as headings, lists, tables, and links. Useful for migrating web content into editable documents.

Remove duplicate lines from multiline text with options to ignore case, trim edges, keep first-seen order, and review frequency stats. Processing stays in your browser.

Count characters, words, lines, paragraphs, and sentences with separate CJK character and English word metrics, plus reading and speaking time estimates. All stats update locally in your browser.

Convert text into uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case, kebab-case, and CONST_CASE at the same time. Useful for variable names and heading cleanup.

Test JavaScript regular expressions with live highlighting, match counts, capture groups, flag toggles, and built-in pattern presets. Matching runs locally in your browser.

Sort multiline text with dictionary order, natural (numeric-aware) order, length order, or shuffle. Optional reverse, case-insensitive compare, dedupe, and blank-line removal all run in your browser.

Turn a title or short phrase into a URL-safe slug with lowercase letters, separators, and punctuation cleanup. Choose hyphen or underscore separators and generate locally.

Run regular-expression find and replace with custom flags and capture-group backreferences such as $1. Batch text cleanup stays in your browser.

Remove blank lines from text, with an option to also drop whitespace-only lines. Line cleanup runs entirely in your browser.

Trim leading and trailing whitespace from whole text or each line, with modes for both ends, leading only, or trailing only. Useful for pasted tables and cleaned lists.

Collapse consecutive spaces into one, with optional Tab collapsing and edge trimming. Newlines stay intact while intra-line whitespace is cleaned locally.

Prefix multiline text with line numbers. Configure the starting number, separator, zero-padding, and whether blank lines are skipped. Numbering runs in your browser.

Detect and strip common leading line-number prefixes such as 1. , 1: , or 1) . Mid-line numbers stay untouched. Cleanup runs locally in your browser.

Split text into multiple lines by a fixed delimiter, character length, or word count. Optionally trim each segment and skip empty parts. Useful for list cleanup and chunking.

Join multiline text into one line with common separators or a custom connector. Optional edge trimming and blank-line skipping help prepare lists and SQL-style value lists.

Convert between fullwidth and halfwidth letters, digits, punctuation, and spaces. Han characters stay unchanged. Useful for Chinese typography cleanup and form input normalization.

Truncate text by character, word, or sentence count with optional word-boundary cutting and a custom ellipsis suffix. Useful for previews, SEO descriptions, and list titles.

Count how often words appear in text and sort by frequency. Supports mixed Chinese and English, minimum length filters, case folding, and Chinese N-gram or per-character modes for SEO and content analysis.

Estimate reading time from Chinese characters and English words with separate speed controls. Also shows character, Chinese, English-word, and paragraph counts for publishing and planning.

Pull numbers from mixed text with support for decimals, negatives, and thousands separators. Deduplicate, sort, and output as newlines or commas for reports, logs, and amount collection.

Batch-extract email addresses from lists, pages, or logs. Deduplicate, lowercase, and export as newlines, commas, or semicolons for contact cleanup.

Extract every regex match from text with flags, capture groups, expand-all groups, dedupe, and multiple output formats for log fields and structured collection.

Extract mainland China mobile numbers from lists or logs, including common separators. Normalize, dedupe, and export as newlines or commas for contact cleanup.

Extract HTTP/HTTPS links from documents, chats, or logs. Clean trailing punctuation, dedupe, and export as newlines, commas, or spaces—all in your browser.

Extract IPv4/IPv6 addresses from logs or mixed text with public-only filtering and dedupe. Export newline or comma lists locally for audits and source stats.

Convert between Simplified and Traditional Chinese locally with OpenCC, including Taiwan, Hong Kong, or general Traditional variants for ops copy and publishing checks.

Measure characters with and without spaces, Chinese characters, English words, sentences, and paragraphs for bilingual drafts.

Split text by a custom delimiter or regex, with trim, empty-block removal, and unique filtering. Useful for CSV-like cleanup and token lists.

Randomize line order for lists or rosters. Optionally skip empty lines, then copy the shuffled list.

Convert plain text into leetspeak (1337) with basic, advanced, and expert substitution levels. Runs locally for playful usernames, samples, and demos.

Render input as multiple Unicode mathematical and stylistic letterforms for bios, titles, and decorative labels. Copy individual styles.

Extract tag names, plain text, or link/image URLs from HTML snippets. Deduplicate results for quick audits of markup and asset references.

Extract emoji (including ZWJ sequences) from mixed text, optionally dedupe them, or copy the cleaned text without emoji.

Improve bilingual copy readability by adding Chinese–English spacing, splitting long sentences, and optionally converting English punctuation to Chinese forms.

Render templates with {{name}}, [name], or $name placeholders using a JSON object of values. See unresolved placeholders and copy the rendered result.

Fill a single template with %1, %2, or %s placeholders from each CSV-style data row to batch-generate SQL statements or scaffold code locally in your browser.

Reformat Markdown tables so columns pad to a consistent visual width, keep :---: alignment markers, and account for full-width characters such as Chinese for readable source layouts.

Estimate how long a script takes to speak aloud using separate Chinese character and English word rates, with adjustable speeds and paragraph stats for talks, podcasts, and timed shares.

Preview text in vertical writing mode with adjustable size, spacing, font, and colors, then export a PNG for poetry layouts, calligraphy references, and Chinese design comps.

Apply optional rules inspired by common Chinese typography conventions: space between Chinese and Latin, Chinese punctuation, corner quotes, ellipsis, dashes, and collapsed spaces—without changing wording.

Annotate Chinese characters with pinyin in ruby, inline, or pinyin-only modes using a simplified local map. Useful for teaching aids and reading practice—not a full dictionary replacement.

Match Chinese copy against a built-in dictionary of common typos and confusable phrases, then list suggested fixes. Processing stays in the browser.

Paste OCR or typed business-card text to extract name, mobile, landline, email, company, title, address, website, and WeChat fields into copyable JSON. Image OCR is not included.

Create an editable header and body grid by column and row counts, optionally prettify pipe alignment, then copy Markdown or export a .md file for README and docs tables.

Use the browser SpeechSynthesis API to speak text with system voices, adjustable pitch and rate. Compare available voices on this device—no cloud TTS service is called.

Generate Chinese placeholder paragraphs by count, length, and style (modern prose, classical essays, or wuxia fiction) for UI prototypes and layout tests that need realistic CJK line breaks.