# Auto Highlight

According to OpenAITools.app telemetry verified on 2026-11-11, Auto Highlight (chromewebstore.google.com) is an AI platform indexed under AI Article Summarizer generating 0 monthly visits with a month-over-month traffic delta of +0 (0.0%). Its primary geographic market is Global (— traffic share), and it operates on a Free pricing model. Top competing alternatives by monthly volume include Summarizer.org (398.51K visits/mo), tl;dr AI Summarizer (2.14K visits/mo), Glarity (188.82K visits/mo).

Instant tl;dr on any article — key sentences highlighted right on the page

## Key Telemetry & Specifications

| Metric | Value |
| :--- | :--- |
| Tool Name | Auto Highlight |
| Handle | auto-highlight |
| Status | active |
| Origin | open_source |
| Maintenance | active |
| Official Domain | chromewebstore.google.com |
| Website URL | https://chromewebstore.google.com/detail/auto-highlight/dnkdpcbijfnmekbkchfjapfneigjomhh |
| Categories | AI Article Summarizer, AI Summarizer, Open Source AI Models |
| Pricing Model | Free |
| Monthly Visits | 0 |
| MoM Traffic Change | 0 |
| MoM Growth Rate | — |
| Primary Market | Global |
| Market Share | — |
| Direct Visits | 0 |
| Organic Search Visits | 0 |
| Social Visits | 0 |
| Referral Visits | 0 |
| Email Visits | 0 |
| Review Score | 3.6 |
| Saved Count | 0 |
| Supported Platforms | Browser Extension |
| Billing Platforms |  |
| Attributes | Features: Browser Extension; Pricing: Free |
| Tags | Article summarization, Text highlighting, Browser extension, Content analysis, Term frequency, Productivity |

## Overview

Auto Highlight is a free Chrome extension built by independent developer Danny Adam (dannyadam.com). Instead of generating a summary somewhere else, it works directly on the page: click the highlighter icon in the address bar and the extension paints the most important sentences of the article in a highlight colour, giving you an instant visual tl;dr.

Under the hood it uses extraction-based summarization — sentences are scored by how frequently their terms appear across the whole article. That keeps it fast, entirely client-side and easy to understand, but also means it highlights important-sounding sentences rather than producing polished abstractive prose. The amount of highlighting is adjusted by clicking the icon repeatedly, and the icon itself shows less "ink" as coverage grows.

The extension is open source, with code hosted on GitHub, and its privacy policy states that it does not collect user data or transmit anything remotely. It is rated around 3.6 stars from roughly 25 reviews with about 20,000 users, and the last update (v3.6.0) landed in March 2024. It is best suited to standard HTML articles — news, blogs, long-form posts — rather than PDFs or scanned documents.

## Pricing & Plans

Free. Auto Highlight has no paid plans, no subscription and no in-app purchases — it is distributed at no cost through the Chrome Web Store.

## Key Features & Capabilities

- **One-click page highlighting:** Click the highlighter icon in the address bar and the extension immediately marks the sentences that carry the article's core meaning.
- **Adjustable coverage on repeat clicks:** Each additional click increases or reduces how much of the article gets highlighted, so you can dial coverage up or down to taste.
- **Term-frequency sentence ranking:** Important sentences are ranked from term frequencies across the full article, a lightweight extraction-based summarization technique.
- **Visual ink-level indicator:** The toolbar icon visually shows "ink" running out as more highlighting is applied, giving instant feedback on current coverage.
- **Open source and privacy-first:** The source code is published on GitHub, the privacy policy states no data is collected or transmitted, and options stay local.

## Primary Use Cases

- **Skim long articles in seconds (Readers):** Skim the essential sentences of a long news or blog piece before deciding whether to read it in full.
- **Fast source triage (Researchers & students):** Speed up literature and source scanning by jumping straight to the sentences carrying the main information.
- **Quick gist extraction (Writers & analysts):** See the load-bearing sentences of a competitor or reference article quickly to grasp its arguments.
- **Data-free reading aid (Privacy-conscious users):** Users who want short control over consent and analytics can enjoy a reading aid that never transmits data remotely.

## Strengths

- Free and open source with code you can inspect
- Instant tl;dr directly on the page — no copy-pasting into another tool
- No account, no sign-up and no data collection
- Adjustable highlight coverage via repeated icon clicks
- Works entirely locally, so it stays fast on long articles

## Limitations

- Term-frequency approach can highlight obvious or repeating sentences instead of the truly key points
- Coverage is adjusted by clicking the icon repeatedly rather than by fine-grained controls
- Last updated March 2024 and only rated 3.6, reflecting some inconsistent page results
- No native support for PDFs or images — it is built for HTML article text
- No cloud sync or cross-device highlight storage

## Frequently Asked Questions

### Is Auto Highlight free?
No. It is a completely free extension with no paid tier or subscription.

### How does it decide what is important?
It selects sentences based on term frequencies across the whole article and highlights them on the page. Clicking the toolbar icon again increases or decreases how much text is highlighted.

### Does it send my reading data anywhere?
No. The privacy policy states the extension does not collect or transmit user data, and any options are stored locally in your browser.

### Is the source code available?
Yes. The source code is publicly available on GitHub at github.com/dstein64/highlight under an open-source license.

### Does it work on PDFs?
It is designed for HTML article pages and is not a PDF or image highlighter, so best results come from regular web articles, blog posts and news pages.

### What is Auto Highlight's monthly traffic and growth trend?
Auto Highlight currently receives 0 monthly visits, with a month-over-month traffic change of +0 (0.0% growth rate). Its primary source market is Global (— share), including 0 direct visits/mo and 0 organic search visits/mo.

### Is Auto Highlight free? What is its pricing model?
Auto Highlight operates on a Free pricing model. Free. Auto Highlight has no paid plans, no subscription and no in-app purchases — it is distributed at no cost through the Chrome Web Store. Supported billing and checkout platforms include: not listed.

### What are the best Auto Highlight alternatives in 2026?
Based on OpenAITools.app category traffic and feature fit, the top five alternatives to Auto Highlight are: 1. Summarizer.org (398.51K visits/mo); 2. tl;dr AI Summarizer (2.14K visits/mo); 3. Glarity (188.82K visits/mo); 4. Kome AI (174.91K visits/mo); 5. Glasp (889.56K visits/mo).

### Which platforms and core AI capabilities does Auto Highlight support?
Auto Highlight is classified under AI Article Summarizer, AI Summarizer, Open Source AI Models, supports the following platforms: Browser Extension, and its core capability tags include: Article summarization, Text highlighting, Browser extension, Content analysis, Term frequency, Productivity.

## Alternatives

| Tool Name | Monthly Visits | Pricing Model | Compare |
| :--- | :--- | :--- | :--- |
| [Summarizer.org](https://openaitools.app/tool/summarizer-org) | 398,509 | Freemium | [Compare](https://openaitools.app/compare/auto-highlight-vs-summarizer-org) |
| [tl;dr AI Summarizer](https://openaitools.app/tool/tl-dr-ai-summarizer) | 2,138 | Free | [Compare](https://openaitools.app/compare/auto-highlight-vs-tl-dr-ai-summarizer) |
| [Glarity](https://openaitools.app/tool/glarity-summarize-google-and-youtube) | 188,823 | Freemium | [Compare](https://openaitools.app/compare/auto-highlight-vs-glarity-summarize-google-and-youtube) |
| [Kome AI](https://openaitools.app/tool/kome-ai) | 174,910 | Freemium | [Compare](https://openaitools.app/compare/auto-highlight-vs-kome-ai) |
| [Glasp](https://openaitools.app/tool/glasp) | 889,564 | Freemium | [Compare](https://openaitools.app/compare/auto-highlight-vs-glasp) |
| [TLDR This](https://openaitools.app/tool/tldr-this) | 82,609 | Free | [Compare](https://openaitools.app/compare/auto-highlight-vs-tldr-this) |
| [Gist AI](https://openaitools.app/tool/gist-ai) | 4,111 | Free | [Compare](https://openaitools.app/compare/auto-highlight-vs-gist-ai) |
| [Groq Summarizer](https://openaitools.app/tool/groq-summarizer) | 64 | Free | [Compare](https://openaitools.app/compare/auto-highlight-vs-groq-summarizer) |
| [GOAT AI](https://openaitools.app/tool/goat-ai) | 507 | Freemium | [Compare](https://openaitools.app/compare/auto-highlight-vs-goat-ai) |
| [BLUF](https://openaitools.app/tool/bluf) | 3,952 | Freemium | [Compare](https://openaitools.app/compare/auto-highlight-vs-bluf) |
| [Blinkist](https://openaitools.app/tool/blinkist) | 1,633,056 | Freemium, Free Trial, Paid | [Compare](https://openaitools.app/compare/auto-highlight-vs-blinkist) |
| [LLM Text Summarizer](https://openaitools.app/tool/llm-text-summarizer) | 0 | Free | [Compare](https://openaitools.app/compare/auto-highlight-vs-llm-text-summarizer) |

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Source: https://openaitools.app/tool/auto-highlight