TextLumo
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6 live tools

Developer Tools

Work with JSON, Base64, Regex, URLs, and encoded data.

Unicode ConverterInspect, escape, and decode Unicode characters and code points. JSON FormatterFormat, minify, validate, and sort JSON safely in your browser. Base64 Encoder / DecoderEncode and decode Unicode-safe Base64 text instantly. URL Encoder / DecoderEncode or decode URL components without sending them anywhere. HTML Entity Encoder / DecoderConvert special characters to and from safe HTML entities. Regex TesterTest JavaScript regular expressions with live match highlighting.

Every TextLumo tool runs locally in your browser.

About this collection

Small developer utilities without the setup.

Format and validate JSON, test JavaScript regular expressions, inspect Unicode code points, or convert encoded text directly in the browser. Inputs remain local, which is especially useful for configuration snippets and test data.

Use them for debugging payloads, preparing URL parameters, checking matching patterns, reviewing escaped characters, and converting text during development.

Private by default: processing happens locally on your device, so pasted text is not uploaded to TextLumo.

TextLumo toolkit

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Word CounterCount words, characters, sentences, lines, and reading time. Text Tools Case ConverterSwitch between sentence, title, upper, lower, and code cases. Text Tools Line OrganizerDeduplicate, sort, or add a prefix and suffix to every line. List Tools Text DiffCompare two versions by line or word and highlight every change. Text Tools Social Character CounterCheck text length against popular social platform limits. SEO Tools Text CleanerRemove extra spaces, line breaks, and empty lines. Text Tools Find & ReplaceFind and replace text with case-sensitive or regex matching. Text Tools Join & Split TextJoin lines or split text using any delimiter. List Tools List CompareFind shared and unique items across two lists. List Tools CSV & Column ToolsConvert lists and CSV or extract a delimited column. Conversion Tools HTML & Text ConverterConvert HTML to plain text or text into clean HTML paragraphs. Conversion Tools HTML & Markdown ConverterConvert common Markdown and HTML structures in either direction. Conversion Tools Data ExtractorExtract URLs, email addresses, or phone numbers from text. Conversion Tools Unicode ConverterInspect, escape, and decode Unicode characters and code points. Developer Tools SEO Content AnalyzerReview keyword density, readability, and writing statistics. SEO Tools Meta Tag CheckerCheck title and description lengths with a search preview. SEO Tools URL Slug GeneratorTurn titles into clean, readable URL slugs. SEO Tools Lorem Ipsum GeneratorGenerate placeholder paragraphs for layouts and drafts. SEO Tools Text to SpeechRead text aloud using voices available in your browser. Conversion Tools JSON FormatterFormat, minify, validate, and sort JSON safely in your browser. Developer Tools Base64 Encoder / DecoderEncode and decode Unicode-safe Base64 text instantly. Developer Tools URL Encoder / DecoderEncode or decode URL components without sending them anywhere. Developer Tools HTML Entity Encoder / DecoderConvert special characters to and from safe HTML entities. Developer Tools Regex TesterTest JavaScript regular expressions with live match highlighting. Developer Tools