Text Tools - String Operations / Encoding / Analysis

Online text statistics: characters (with/without spaces), whitespace, UTF-8 bytes, CJK/Latin word breakdown, lines, non-empty lines, paragraphs, and reading time.

Online text case converter: UPPER CASE, lower case, Title Case, camelCase, snake_case, kebab-case, CONSTANT_CASE.

Online slugify tool: turn any title into a URL-friendly slug with automatic Chinese-to-pinyin conversion, separator and case options. Perfect for blog post URLs and SEO-friendly links. Runs locally in your browser.

Free online URL slug generator that converts titles into SEO-friendly slugs with hyphen/underscore separators, lowercase toggle, and CJK support. Runs locally.

Free online text sort tool. Supports alphabetical, numerical, natural, by-length sorting and more.

Free online text reverser supporting character, word, and line modes with correct CJK and Emoji handling. All processing runs locally in your browser.

Free online whitespace remover with trim, remove empty lines, collapse spaces, and strip all whitespace modes. Essential for text cleanup. Runs locally.

Free online text deduplication tool. Quickly remove duplicate lines, supports ignore case, sort and more options.

Free online text extraction tool, quickly extract emails, phone numbers, URLs, IP addresses, ID numbers, supports custom regex

Free online text find and replace tool with regex support, case insensitivity, capture group references, and batch text replacement.

Free online line batch processing tool: add prefix/suffix, remove empty lines, line numbers, dedupe, reverse, filter — all in one click.

Free online image to ASCII art converter with monochrome/color modes, adjustable width and character sets, all processed locally with no uploads

Online text diff comparison tool: uses LCS algorithm to compare two texts line by line, highlighting additions, deletions, and modifications. Powered by Monaco DiffEditor with syntax highlighting.

Free online Diff Summary Tool for developers. Try instantly with no setup. All local processing.

Analyze character frequency in ciphertext or plain text: case folding, whitespace/punctuation filters, Top-N, bar chart, CSV/JSON export. Free, local processing.

Paste mojibake text and get the likely original encoding (UTF-8/GBK/Latin-1/Shift-JIS) with a concrete fix and evidence characters. Diagnosis runs locally.

Free online Chinese typesetting normalizer: pangu spacing between CJK and Latin text, fullwidth punctuation in CJK context, and 40+ tech proper-noun casing fixes.

Free curated regex library: 14 verified patterns for CN mobile/ID/plates (incl. new-energy)/credit codes, email, URL, IPv4 and dates — each with notes, samples, and one-click copy.

Online Base64 encoder and decoder with UTF-8 by default for Chinese and emoji, plus GBK / Latin-1 charset switching. All processing runs locally in your browser. No data sent to servers.

Free online Base64 batch encoding and decoding tool with multi-line batch processing, URL Safe variant, and original text reference.

Free online Base32 and Base58 encoder/decoder tool. Supports bidirectional conversion.

Free online Data URI generator tool supporting file and text to data: protocol URL conversion with both Base64 and URL encoding options.

Online URL encoder and decoder tool. Supports URI component encoding (encodeURIComponent) and full URL encoding. Processed locally in your browser.

Online HTML entity encoder and decoder. Convert <, >, &, " and other special characters to HTML entities, or decode them back. Processed locally in your browser.

Free online HTML entity encoder/decoder supporting 244 named entities, with decimal/hexadecimal/named entity conversion.

Free online Unicode encoder/decoder. Convert between Chinese/Japanese characters and \uXXXX format for i18n debugging.

Online number base converter: convert between binary, octal, decimal, hexadecimal, and any radix 2–36, with batch mode and BigInt-safe large integers.

Free online number base converter. Supports binary/octal/decimal/hexadecimal conversion with bit operations and bit visualization.

Free online byte unit converter. Quickly convert between B, KB, MB, GB, TB, PB and KiB, MiB, GiB, TiB. Supports both decimal (1000) and binary (1024) standards. Essential tool for developers and DevOps engineers.