Basic tools

The everyday essentials: count words and characters, convert case, find and replace, compare two texts. Everything runs locally and updates as you type.

Action word densityMeasure narrative pacing by how many action verbs appear in each segment of your text.

Anagram checkerCheck whether two texts are anagrams of each other and see exactly which letters differ.

Case converterConvert text between twelve formats, from UPPERCASE to camelCase and kebab-case.

Cliche detectorScan your writing for clichés, filler words and empty corporate padding.

Count occurrencesFind out how many times a word or phrase appears in your text.

Count words per lineAdd word counts to each line of your text.

Dialogue balance counterSee how dialogue is split between characters in a screenplay or script.

Duplicate word finderFind words that occur more than once in your text.

Email subject line checkernewCheck subject lines for length, mobile/desktop truncation and spam trigger words.

Find and replaceReplace every occurrence of a word or pattern, with optional regex support.

Google Ads length checkernewCheck headlines, descriptions and paths against Google Ads character limits before you upload them.

Keyword density checkerCheck how often each keyword appears in a text and what share of it that makes.

Language detectornewEstimate which language a piece of text is written in, ranked by confidence.

Letter frequency counterCount how often each letter appears in a text, with counts and percentages.

Levenshtein distanceMeasure the edit distance between two strings, plus a similarity percentage.

Longest Word FinderFind the longest and shortest words and calculate the average word length.

Palindrome checkerCheck whether text reads the same backwards and find palindromic words in it.

Pangram checkerCheck whether your text contains every letter of the alphabet and see which are missing.

Passive voice detectornewFind passive-voice sentences in your text and see who or what performed the action.

Readability score checkerScore text readability with Flesch, Fog, ARI and Coleman–Liau.

Reading time calculatorEstimate how long a text takes to read aloud or silently.

Reverse outlinenewTurn a draft into a list of its opening sentences, so its structure becomes visible.

Rhyme scheme analyzerLabel each line's rhyme group (A, B, C…) and see the pattern at a glance.

Sentence counterCount sentences, paragraphs and average sentence length, and flag overlong sentences.

Shannon entropy calculatorMeasure how many bits of information each character or word of your text carries.

SMS message counternewCount how many characters and text messages your text takes up.

Social media character limitsCheck your text against the character limits of X, LinkedIn, Instagram and more, at once.

Subtitle reading speed (CPS)Measure characters per second for every subtitle cue and flag the ones nobody can read.

Syllable counterCount syllables in your text — total, average per word and a per-word breakdown, with long words flagged.

Text diffCompare two texts line by line and see exactly what was added and removed.

Text direction detector (LTR/RTL)Detect whether text runs left-to-right or right-to-left and get the dir attribute to use.

UTF-8 byte counterMeasure the real size of text in UTF-8 bytes, UTF-16 units, code points and graphemes.

Word and character counterCount words, characters, sentences, paragraphs and reading time in any text.

Word frequency counterList every word in a text with how many times it appears, ranked by count.

Basic tools

These are the tools most people reach for first: a word counter that also tracks characters, sentences and reading time, a case converter for switching between UPPERCASE, lowercase and Title Case, find and replace with plain-text or regex matching, and a text diff that highlights exactly what changed between two versions.

Everything runs locally in your browser. The text you paste is never uploaded, which matters when you are checking a contract, an essay or an email you have not sent yet. There is no sign-up, no word limit worth worrying about, and results update live as you type.

Writers use the word counter to hit essay and ad-copy limits, editors compare drafts with the text diff, and developers fix inconsistent capitalization with the case converter. If you need something more specific — counting UTF-8 bytes for an SMS or database field, checking word frequency for SEO, or testing whether a phrase is a palindrome — those live here too. Each tool is free, loads fast and works on your phone as well as your desktop.