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Free Text Tools: Analysis, Formatting & Transformation

Discover our collection of free professional text tools to analyze, format and transform your content. Word and character counter, SEO keyword density analyzer, case converter (upper/lower/title), spell checker, and more. 100% local instant processing.

12 free tools

AI Text Summarizer

Automatically summarize your long texts with AI - Free

Popular

Remove Duplicate Lines

Automatically remove duplicate lines from your text and lists

Text Formatter

Clean and reformat your text: spaces, line breaks, accents

Text Reverser

Reverse characters, words, lines or sentences in your text

Remove Empty Lines

Remove empty lines and extra spaces from your text

Random Text Generator

Generate Lorem Ipsum, random words, sentences, paragraphs, UUIDs and passwords

Twitter/X Character Counter

Count characters in your tweets with 280 limit and thread prediction

Word Counter

Analyze your text: word count, character count and line count.

Case Converter

Easily change the text case with this free online case converter.

Générateur d'attestation d'hébergement

Créez quickly une attestation d'hébergement prête à imprimer et conforme aux démarches administratives

Text Compare Tool

Comparez deux textes et identifiez les différences

Text Cleaner

Supprimez espaces, lignes vides et formatage

Why Use Our Online Text Tools?

Online text processing tools save you time on repetitive tasks that would otherwise require copy-pasting into Word, Excel or manual scripts. Our collection of free 2026 text tools covers all text analysis, formatting and transformation needs.

Word and Character Counter

Our word counter analyzes your text in real-time and displays: total word count, character count with spaces, character count without spaces, sentence count, paragraph count, estimated reading time (speed 200-250 words/minute), lexical density (unique words / total words ratio). Essential for web writers, students (essays with word limits), authors (novels, articles), community managers (Twitter 280 character limit, LinkedIn 3000, Facebook 63206). Automatically detects text language and adjusts counting rules (French non-breaking spaces, Chinese/Japanese characters).

SEO Keyword Density Analyzer

Our keyword analyzer calculates the density of each word and phrase in your text: appearance frequency of each word, density percentage (occurrences / total words × 100), ranking by descending frequency, multi-word phrase detection (2-3 words), stop words exclusion (the, a, of, and, in...). Essential tool for SEO optimization: Google recommends 1-3% density for main keyword, 0.5-1% for secondary keywords. Avoid over-optimization (keyword stuffing) which penalizes ranking. Perfect for blog article writing, sales pages, e-commerce product sheets.

Case Converter (upper/lower)

Our case converter instantly transforms your text: ALL UPPERCASE (uppercase, useful for graphic titles, typographic shouts), all lowercase (lowercase, data normalization), First Letter Uppercase Each Word (title case, professional titles), Normal sentence case (sentence case, first letter of sentence capitalized), iNVERTED cAsE (toggle case, stylistic effect). Quickly correct text accidentally typed with Caps Lock on. Ideal for writers, virtual assistants, data scientists cleaning textual datasets.

Duplicate Detection and Removal

Our duplicate line detector identifies and removes duplicate lines in your lists: exact duplicate detection (case sensitive or insensitive by choice), duplicate count per line, automatic removal with single occurrence preservation, optional alphabetical sorting. Essential for email list cleaning, textual database deduplication, CSV file merging, AdWords keyword list cleaning. Handles lists up to 100,000 lines without slowdown.

Security and Privacy

All our secure text tools work with 100% local processing (client-side) in your browser via JavaScript. Your texts are NEVER sent to our servers or stored. Complete processing (counting, analysis, transformation) happens on your device. You can copy-paste confidential texts (contracts, strategies, private content) safely. Maximum GDPR compliance: zero textual data collection.

Frequently Asked Questions

Yes, our multilingual word counter automatically detects text language and applies appropriate counting rules. For Western languages (French, English, Spanish...), a word is delimited by spaces or punctuation. For spaceless Asian languages (Chinese, Japanese, Thai), we use advanced segmentation algorithms (tokenization) to count significant characters. Special cases handled: French apostrophes (l'arbre = 1 word, not 2), hyphens (state-of-the-art = 1 compound word), numbers (2024 = 1 word), acronyms (NASA = 1 word). For ultra-precise academic document counting, we recommend also checking in Word/LibreOffice.

Optimal keyword density depends on content type and competition. General rules: main keyword: 1-3% density (appears 1-3 times every 100 words), secondary keywords: 0.5-1% each, semantic variations: distribute naturally without forcing. WARNING: Google penalizes keyword stuffing (over-optimization >5%) via Panda algorithm. Better a natural text at 0.8% than a robotic text at 4%. Also use synonyms and long-tail expressions. Context: 1000-word blog article = 10-30 main keyword occurrences OK, 300-word product page = 3-9 occurrences. Search intent and content quality trump raw density.

Yes, our text tools can process large volumes thanks to optimized local JavaScript processing. Practical limits depending on your device: texts up to 500,000 characters (~100,000 words): instant processing on modern computers (8+ GB RAM), texts 500,000 - 2,000,000 characters: may take 2-5 seconds, slight slowdowns possible, texts >2,000,000 characters: may saturate RAM on weak devices. For extreme volumes (entire books, massive databases), split into multiple parts or use dedicated desktop tools. The word counter easily handles a 100,000-word novel (~600,000 characters).

Our tools work on plain text only. Rich formatting (bold, italic, colors, fonts) is removed when copy-pasting into our tools. Only preserved: paragraph structure (line breaks), spaces and tabs, Unicode special characters (emojis, accents, symbols). If you need to preserve rich formatting, use your word processor features directly (Word, Google Docs). Our tools are designed for pure textual content analysis and transformation, not graphic layout.

NO, absolutely no storage. All our text tools work 100% locally in your browser via JavaScript. When you paste text into our tools: it's loaded into your device's RAM, processed by your computer/smartphone processor, results display instantly, EVERYTHING is deleted when you close the tab or refresh the page. YOUR TEXTS NEVER LEAVE YOUR DEVICE. No data is transmitted to our servers. You can verify in browser developer tools (F12 > Network): zero HTTP requests during analysis. You can therefore process ultra-confidential content safely.

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We regularly add new free tools. Feel free to suggest a tool.

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Last updated: March 12, 2026
Created on: January 18, 2024