Online Text Tools
Add Line Numbers
Instantly add line numbers to any block of text. Set the start number, choose a separator style, pad with leading zeros, and skip blank lines. Free online tool — no sign-up needed.
Add Numbers in Text
Paste any block of text and instantly add up every number it contains. Handles whole numbers and decimals mixed in with words. Free, runs entirely in your browser.
Case Converter
Convert text between uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case, kebab-case and more. Free, instant, no sign-up required.
Find and Replace Text
Find and replace text online instantly. Supports plain text and regular expressions. Shows match count before replacing. No sign-up required — runs entirely in your browser.
Hashtag Count Checker
Count hashtags instantly, find duplicates, and check platform-friendly hashtag totals for Instagram, TikTok, LinkedIn, and X posts.
HTML Entity Encoder / Decoder
Encode special characters into HTML entities (<, &, ") or decode HTML entities back to plain text. Fast, free, and browser-based — no data sent anywhere.
ISBN-10 to ISBN-13 Converter
Convert between ISBN-10 and ISBN-13 instantly. Validates the check digit, shows the calculation steps, and supports batch conversion of multiple ISBNs at once. Free and no sign-up required.
Levenshtein Distance Calculator
Calculate the Levenshtein edit distance between two strings instantly. See every insertion, deletion, and substitution highlighted step by step. Includes similarity percentage, the full DP matrix, and real-world use cases.
LinkedIn Post Formatter
Format your LinkedIn posts with proper line breaks, character counting, and "see more" cutoff preview. Copy your formatted post ready to paste into LinkedIn. Free, no login.
Lorem Ipsum Generator
Generate lorem ipsum placeholder text instantly. Choose paragraphs, sentences, words, or bytes. Classic lorem ipsum or randomised. Free, fast, no ads in the way.
Markdown Table Generator
Build markdown tables quickly with custom rows, columns, and alignment. Generate clean GitHub-flavored markdown table syntax in your browser.
Morse Code Converter – Text to Morse Code and Back
Convert text to Morse code or decode Morse code back to plain text instantly. Supports all letters, numbers, and common punctuation. Free, browser-based Morse code translator with audio playback.
Number to Words Converter
Convert any number to words instantly. Spell out integers, decimals, negative numbers, and large numbers in full English text. Free online number to words converter.
PDF Text Extractor
Extract all text from a PDF file and copy it to your clipboard. Browse text by page, search within the extracted text, and download as a plain text file. Free, no uploads.
Random Case Converter
Instantly convert any text to random case online. Every letter is randomly uppercased or lowercased as you type. Free, no sign-up, works on any device.
Random Word Generator
Generate random words instantly. Filter by part of speech — nouns, verbs, adjectives, or adverbs. Choose how many words you need. Free online tool.
Readability Checker
Instantly check the readability of any text with Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog Index, and Coleman-Liau Index. Free, browser-based readability score calculator — no upload required.
Reading Time Calculator
Paste any text to instantly estimate reading time at your chosen reading speed. Shows word count, sentence count, and reading time in minutes. Free, instant, browser-based reading time estimator.
Remove Duplicate Lines
Remove duplicate lines from text instantly. Paste your text, click Remove Duplicates, and get clean deduplicated output. Supports case-insensitive matching and blank line removal. Free, no sign-up.
Remove Line Breaks
Remove line breaks and unwanted newlines from text instantly. Paste text copied from PDFs, emails, or documents and join it into clean readable paragraphs. Free online tool — no sign-up required.
Reverse Each Word
Reverse the letters of every word in your text while keeping words in the same order. Free online tool — type or paste and results update instantly.
Reverse Lines
Reverse the order of lines in any block of text instantly. Paste your content, optionally strip blank lines, and copy the result. Free online line reverser tool.
Reverse String
Reverse any string of text instantly in your browser. Type or paste and the reversed output appears live. Free online string reverser tool, no sign-up needed.
Reverse Words
Reverse the order of words in any text instantly. Paste a sentence and this free tool flips it so the last word comes first, keeping each word intact.
Sentence Counter
This online sentence counter will quickly and easily tell you how many sentences are in the text you type, copy and paste, or upload to it.
Social Media Bio Generator
Generate optimized bios for Instagram, Twitter/X, LinkedIn, TikTok, and YouTube. Enter your details once and get a tailored bio for each platform, respecting each character limit. Free.
Social Media Character Counter
Count characters for Twitter/X (280), Instagram captions (2,200), Facebook posts (63,206), LinkedIn posts (3,000), and more. Live counter with limit warnings. Free and instant.
Text Cleaner – Remove Extra Spaces, Fix Formatting, Strip HTML
Clean up messy text in one click. Remove extra whitespace, fix smart quotes, strip HTML tags, normalize line breaks, and more. Free online text cleaner — no upload, runs entirely in your browser.
Text Diff Compare
Compare two blocks of text side by side and instantly see additions, deletions, and unchanged lines highlighted. Free online text difference checker — no upload, no login, runs entirely in your browser.
Text to Slug
Convert any text to a URL-friendly slug instantly. Lowercases text, replaces spaces with hyphens, and strips special characters. Great for blog posts, URLs, and file names. Free online slugify tool.
Twitter Thread Creator
Split any long text into a numbered Twitter/X thread automatically. Respects sentence boundaries, shows character counts, and lets you copy each tweet individually or all at once.
Word Counter
Count words, characters, vowels and consonants with this free online word counter. Just type, paste, or upload your text and our tool will take care of the rest.
Word Frequency Counter
Paste any text to see how often each word appears. Sort by frequency, filter out common stop words, and copy the results as CSV. Free word frequency analysis tool, no sign-up required.
More Tools
Finding the right tool online can make everything quicker and easier. Here's a growing collection of 33+ free online tools dealing with text and text files — no sign-up, and everything runs directly in your browser.
Formatting & Cleanup
The Case Converter switches text between UPPERCASE, lowercase, Title Case, and Sentence case in one click. The Text Cleaner strips extra whitespace, smart quotes, and other formatting noise pasted in from Word or PDFs. For line-by-line cleanup, there's Remove Duplicate Lines, Remove Line Breaks, and Add Line Numbers.
Comparing & Searching Text
The Text Diff tool highlights every difference between two blocks of text side-by-side — useful for comparing document revisions or code snippets. Find and Replace supports plain text and regular expression patterns across large blocks of text at once.
Word Counts & Readability
The Word Frequency Counter ranks every word in a passage by how often it appears. The Readability Checker scores text against standard readability formulas (like Flesch-Kincaid) to estimate the grade level needed to understand it, and the Reading Time Calculator estimates how long a passage takes to read aloud or silently.
Encoding & Conversion
The Text to Slug tool converts any string into a clean, URL-safe slug. The Morse Code Converter translates text to and from Morse code, and the Lorem Ipsum Generator produces placeholder text in configurable lengths for mockups and layouts.
ISBN Converter
Convert between ISBN-10 and ISBN-13 with automatic format detection and check-digit validation. The tool shows a step-by-step breakdown of the check-digit calculation, supports batch conversion of multiple ISBNs at once, and clearly flags entries with invalid check digits. Useful for catalog management, library systems, and bookseller databases that need to work with both formats.
ISBN-10 has been superseded by ISBN-13 since 2007, but older records, citations, and APIs frequently still use the 10-digit format. Any ISBN-13 starting with 978 has an ISBN-10 equivalent; numbers starting with 979 do not.
Frequently Asked Questions
- Is any of my text uploaded to a server?
- No — every tool on this page runs entirely in your browser using JavaScript. Whatever you type or paste never leaves your device.
- What's the difference between a readability score and a reading time estimate?
- A readability score (like Flesch-Kincaid) measures how difficult text is to understand based on sentence length and word complexity. A reading time estimate just measures how long the passage takes to read at an average pace — the two are related but answer different questions.
- Can I compare two entire documents with the text diff tool?
- Yes. Paste both versions into the two panes and every added, removed, or changed line is highlighted, making it easy to review revisions without reading the whole document line by line.