BYTETOOLS

Writing Tools

Readability scorers, sentence and paragraph analyzers, outline builders, quote formatters and writing-productivity utilities for authors, students and copywriters.

61 free tools

Syllable Counter

Count syllables in any word, sentence or paragraph instantly, with a per-word breakdown. Great for poetry, haiku and readability. 100% in-browser.

Gunning Fog Index Calculator

Calculate the Gunning Fog Index of your text and see the grade level, complex-word list and sentence stats. Free, instant and 100% in your browser.

SMOG Readability Calculator

Calculate the SMOG grade of your text from polysyllabic words and sentence count. The standard for health content — free and 100% in-browser.

Coleman-Liau Index Calculator

Compute the Coleman-Liau readability index from letters and sentences per 100 words — no syllable guessing. Free, instant and fully in-browser.

Automated Readability Index (ARI) Calculator

Calculate the ARI of any text from characters, words and sentences, mapped to US grade level and reader age. Free, instant, 100% in-browser.

Lexical Density Calculator

Measure lexical density — content words as a share of all words — plus type-token ratio and unique word count. Free and 100% in your browser.

Sentence Length Analyzer

Analyze sentence lengths: average, median, longest, shortest and variation, with long sentences flagged in color. Free and 100% in-browser.

Adverb Counter

Find and count adverbs in your writing — -ly words plus common non-ly adverbs — with highlights and density. Free, private, 100% in-browser.

Passive Voice Checker

Detect passive voice sentence by sentence, with constructions highlighted and a passive percentage score. Free, heuristic-based, 100% in-browser.

Filler Word Finder

Find filler and hedge words like very, really, just and basically, see them highlighted, and strip them all with one click. 100% in-browser.

Transition Word Checker

Check what percentage of your sentences use transition words against the 30% guideline, with category breakdown and highlights. 100% in-browser.

Cliché Finder

Scan your writing for 100+ clichés and business jargon phrases like low-hanging fruit, with counts and in-context highlights. 100% in-browser.

Repeated Words Checker

Find words repeated too close together — plus doubled words like “the the” — with a proximity window you control. Free and 100% in-browser.

Words to Pages Converter

Convert a word count into pages (and back) for Arial, Times New Roman or Calibri at 11 or 12 pt with single, 1.5 or double spacing. Free and instant.

Speech Time Calculator

Work out how long your speech or presentation will take at slow, average or fast speaking rates — or how many words you need for a 5-minute talk.

Title Case Converter

Convert any headline to proper title case under AP, Chicago, MLA, APA or New York Times rules — real minor-word lists, not naive capitalization.

Headline Analyzer

Score any headline on length, SERP pixel width, emotional and power words, format and numbers — with a fully transparent points breakdown.

Table of Contents Generator

Paste Markdown or HTML and get a nested, linked table of contents with GitHub-style anchor slugs — output as Markdown, an HTML list or plain text.

Citation Generator

Format references in APA 7, MLA 9, Chicago, Harvard or IEEE for books, journal articles, websites and videos — manual entry, no lookups, fully private.

In-Text Citation Generator

Build parenthetical and narrative in-text citations for APA 7, MLA 9, Chicago author-date and Harvard, with correct et al. rules and page formats.

Writing Prompt Generator

Generate random story prompts from genre, character, setting, conflict and constraint banks. Lock the parts you like and reroll the rest — free and offline.

Email Signature Generator

Create a clean, professional HTML email signature for Gmail, Outlook and Apple Mail — table-based, image-free and copy-ready, with your brand colour.

Blog Title Generator

Turn one keyword into 25 ranked blog title ideas using proven headline formulas — how-to, list, question, guide and comparison — scored and sorted.

Haiku Syllable Checker

Check your haiku against the 5-7-5 syllable pattern (or tanka 5-7-5-7-7) with per-line counts and a word-by-word syllable breakdown.

Writing Goal Calculator

Turn a word-count target and deadline into a daily writing plan: words per day, a full schedule table and a projected finish date at your own pace.

Linsear Write Formula Calculator

Calculate the Linsear Write score of any text and see the US grade level, the easy and hard word counts and every step of the arithmetic. Free and instant.

LIX Readability Calculator

Calculate the LIX readability index and the companion RIX score for any text, with difficulty bands, school-year equivalents and the long words highlighted.

Fry Readability Graph

Plot your text on the Fry readability graph. Three 100-word samples are measured for syllables and sentences, then charted to read off the US grade level.

Raygor Readability Estimate

Plot your text on the Raygor readability graph. It counts words of six or more letters instead of syllables, so no syllable judgement is needed at all.

FORCAST Readability Calculator

Calculate the FORCAST readability grade for forms, checklists and technical manuals. It ignores sentence length entirely and counts single-syllable words.

Sentence Opener Analyzer

See how every sentence in your draft begins. Groups openers by first word and by pattern, and flags runs of consecutive sentences that start the same way.

Dialogue Percentage Calculator

Measure the dialogue-to-narration ratio in your manuscript. Counts quoted words and characters, breaks the result down per scene, and highlights every passage.

Paragraph Length Analyzer

Analyze paragraph lengths in your writing: words, sentences and characters per paragraph, with mean, median, standard deviation and wall-of-text warnings.

Word Cloud Generator

Make a word cloud from any text, free and online. Counts word frequency, removes stop words, sizes each word by frequency and downloads the result as a PNG.

Chapter Word Count Tracker

Split a manuscript into chapters and see the word count, page count and reading time of each, with a bar chart, outlier flags and progress against your target.

Screenplay Page Calculator

Estimate script pages and screen time from pasted screenplay text. Classifies every element and wraps it at industry widths to count the typed lines.

Story Beat Sheet Calculator

Turn a target word count or page count into the exact position of all 15 Save the Cat beats, plus three-act and four-part structure, as a copyable checklist.

Manuscript Word Count Planner

Turn a target word count and a deadline into a daily writing schedule, with days off, the pace you need and a cumulative table you can export as CSV.

Writing Streak Tracker

Log your daily word counts and track your current streak, longest streak, total words and daily average, with a 12-week heat grid and CSV export.

Words Per Page Calculator

Work out how many words fit on a page for your font, point size, line spacing, page size and margins, and convert word counts into pages or back again.

RIS to BibTeX Converter

Convert RIS reference records into BibTeX entries, or BibTeX back into RIS, with automatic citation keys, type mapping and a downloadable .bib or .ris file.

Reference List Sorter

Alphabetise a bibliography by author surname, remove duplicate references, renumber the list and re-wrap every entry with a proper hanging indent.

ISBN Validator & Converter

Validate an ISBN check digit, convert between ISBN-10 and ISBN-13, add the correct hyphens and check a whole list at once with a pass or fail column.

Book Page Count Calculator

Estimate the printed page count of your book from the word count, trim size, margins, font size and leading, with front and back matter included.

Book Spine Width Calculator

Calculate book spine width from page count and paper stock, then get the full wrap-cover canvas size with bleed in both inches and millimetres.

Book Royalty Calculator

Work out self-publishing royalties per copy for ebooks, paperbacks and hardcovers, with delivery costs, print costs and a break-even copy count.

Blog Post Outline Builder

Build an H2 and H3 outline, share a target word count across the sections by weight, and export the plan as Markdown headings, a numbered list or a table.

Email Subject Line Checker

Check where your email subject line gets cut off in Gmail, Outlook and iPhone Mail, and see which spam-trigger words, capitals and punctuation could hurt it.

Online Teleprompter

Scroll your script at an adjustable words-per-minute speed with mirror mode, full screen, a countdown and keyboard control, right in your browser.

Subtitle Reading Speed Checker

Check characters per second, words per minute, line length and gaps in any SRT or VTT file, then export retimed subtitles. Runs entirely in your browser.

Audiobook Length Calculator

Turn a manuscript word count into finished hours, studio time, narration cost and audio file size, with a chapter-by-chapter breakdown. Free and in-browser.

Translation Cost Calculator

Price a translation job from CAT match bands, with editable payable percentages, minimum charges, rush fees, DTP and proofreading, per language pair.

Resume Keyword Matcher

Compare your resume against a job description, see which keywords and phrases you cover, which are missing, and how densely each section uses them.

Standard Manuscript Formatter

Turn pasted prose into a standard manuscript format PDF — Courier 12, double spaced, one-inch margins, title page, running header and scene breaks.

Screenplay Formatter

Convert Fountain-style plain text into an industry-formatted screenplay PDF with correct margins, page breaks, (MORE) and (CONT'D), plus a page count.

Book Index Generator

Turn a list of terms and page numbers into a sorted book index with letter headings, merged page ranges, sub-entries and See / See also cross-references.

POV Consistency Checker

Split a manuscript into scenes and check the point of view in each — pronoun counts, dominant POV, filter verbs and head-hopping between viewpoint characters.

Dialogue Tag Analyzer

Analyse how your dialogue is attributed — said and asked versus exotic tags, adverb-propped tags, action beats and long runs with no attribution at all.

Oxford Comma Checker

Find every three-item list in your text, see which use the Oxford comma and which don't, and apply one-click fixes to bring a whole document to one style.

Plain English Checker

Flag bureaucratic wording, hidden verbs, long sentences and passive voice, with everyday replacements from an A–Z of over 200 plain-English alternatives.

British to American Spelling Converter

Convert text between British and American spelling in both directions, with guarded rules, an Oxford -ize mode and a full list of every change made.