Twelve professional micro-tools in one browser tab. No login, no limits — just fast, clear analysis of your writing.
Paste text, then run
Highlights long sentences & complex phrases
Finds passive constructions
Top keyword frequency analysis
Measures formality, confidence & positivity
Quick SEO content audit
Checks for common misspellings
Checks your/you're, there/their, capitalisation & spacing
Enter a target keyword, then click Analyse
Paste text into both panels, then click Compare
Type a headline above, then click Analyse
Each tool has a dedicated page with guides, examples, and frequently asked questions.
The SmartWriteTools is a free, browser-based set of writing micro-tools built for students, bloggers, content marketers, and professionals. Standard tools run entirely in your browser; a few clearly-marked optional AI tools (Clarity Rewrite, Tone Rewrite, AI Fix Grammar, Paraphraser and Summarizer) send only the text you choose for rewriting.
Use the word counter and character counter to hit essay limits. Use the reading time calculator to gauge blog post length. Run the keyword density checker to balance your SEO content. Flag passive voice with the passive voice detector, and improve readability with the clarity highlighter.
Unlike bloated writing suites, each tool here is instant, purposeful, and focused on a single writing problem. Think of it as a Hemingway Editor meets a lightweight SEO auditor — built for speed.
Every standard tool on this page runs entirely in your browser. When you paste or type text, it is processed locally on your device with JavaScript — nothing is uploaded to a server, stored, or used beyond showing your result. That is why there is no sign-up, no account, and no word limit. A small number of optional AI tools are clearly marked and, only when you click them, send the text you entered to an AI provider to generate a rewrite; that text is not stored or used for training.
Each tool uses transparent, rule-based analysis rather than a black box:
We explain each metric in plain English in our blog guides, and we document how we keep this site accurate and honest in our editorial standards.
Are these tools really free?
Yes. Every tool is free, runs in your browser, and requires no account, no sign-up, and no word limit.
Do you store or sell my text?
No. Standard tools process text locally on your device and never upload it. The optional AI tools send only the text you choose to an AI provider to generate a rewrite; it is not stored by us or used for training.
How is the clarity score calculated?
We combine the Flesch-Kincaid grade level, average sentence length, and the share of long words into a single 0–100 score. Shorter sentences and simpler words score higher.
Can I use these tools on a phone?
Yes. Every tool works in any modern browser, on desktop and mobile.
How do you keep the tools free?
Advertising may be shown to cover costs. Ads are clearly marked and never affect how a tool works or what it does with your text.