Products

writewithharper.com

The Free Grammar Checker That Respects Your Privacy

writewithharper.com Chrome Web Store DiscordWriting & Documents / Grammar & Proofreading

AI Benchmark
Desktop
Mobile
Monthly visits
143.1K
Up32.9%MoMSep 2026
Public revenue
Undisclosed
No public revenue evidence yet
Entry price
Free
No monthly subscription pricing
Creators
chilipepperhott
@mordestack· 940 followers
Launched
2y ago
2024-11-04 · Est.

Traffic

Monthly visitsData through Sep 2026 · Oct 2026 pending
Events5 changes

Marketing moves

Launches, search & content, referrals, promotions
  • Launched on Show HN (1 pts)Launch

    Harper.js a portable toolkit for offline grammar checking

    Apr 3, 2025 · 20mo agoLaunch page

  • Launched on Show HN (1 pts)Launch

    Harper.js, Grammar Checking for JavaScript

    Mar 21, 2025 · 20mo agoLaunch page

  • Launched on Show HN (1 pts)Launch

    A Private Grammar Checker

    Feb 14, 2025 · 21mo agoLaunch page

  • Launched on Show HN (14 pts · 1 comments)Launch

    Harper, an Offline Grammarly Alternative

    Nov 4, 2024 · 2y agoLaunch page

Third-party reviews & case dossiers

Acquisition breakdowns, engineer reviews & open-source metrics
Console.dev
2024-10-03Source
What engineers like:
Like Grammarly, but local. Available as a language server for IDE integration. Also available as an Obsidian or Zed plugin. Low-latency linting with minimal memory usage. WebAssembly build also available for embedding into apps. Customizable dictionary with config.
Trade-offs & limitations:
No easily accessible quick start guide - you need to delve into the GitHub repo to find the instructions.
Best suited for:
Developers should consider Harper

MCP Server & Agent Ecosystem

GitHub · MCP / Skill

Store data

Chrome Web Store
Chrome Web Store Chrome Web Store
Update date not synced
Rating
Rating not syncedRating count not synced
New ratings last mo
—
Price & IAP
FreeIAP data not synced
Current version
—Store metadata

Store assets, rating histograms, install tiers, and screenshots are synced from Apple App Store, Google Play, and Chrome Web Store.

Traffic sources

Sep 2026

Traffic breakdown

Channels

  • Direct52%
  • Organic Search32%
  • Social11%
  • Referrals4%
  • Other1%

Countries

  • United States48%
  • India7%
  • Canada3%
  • Vietnam2%
  • Germany2%

Search

Domain authority —Domain registered 2024-03-03

KeywordMonthly volume
grammar checker480.9K
harper37.2K
harper grammar checker1,550
harper spellcheck370
free off line grammer checker—

Traffic data: Vaneform

Pricing

Website does not list public plan prices.

Trial: None · Observed 2026-11-03 · Source page

Pages & changes

Tracked since 2026-07-31

Key pages

Weekly snapshots
writewithharper.com/ Snapshot 2026-11-04

Changes

  1. Nov 1 · 14d ago

    Homepage headline (H1) changed to “Hi. I’m Harper.”Positioning

    Hi. I'm Harper.→Hi. I’m Harper.

  2. Nov 1 · 14d ago

    Adopted technology: Font AwesomeFeatures

    —→Font Awesome

  3. Nov 1 · 14d ago

    Removed technology: Tailwind CSSFeatures

    Tailwind CSS→—

  4. Nov 1 · 14d ago

    Removed technology: UnoCSSFeatures

    UnoCSS→—

  5. Nov 1 · 14d ago

    Homepage title changed to “Harper: The Private Grammar Checker”Positioning

    Harper | Privacy-First Offline Grammar Checker for Developers & Writers→Harper: The Private Grammar Checker

Design

First-screen visual analysis & :root CSS

Editorial (Light canvas, airy density) featuring centered headline + cta layout and pure typography & geometry visuals.

First-screen preview · click to zoom

First-screen pitch & conversion flow

“Hi. I’m Harper.”

Centered Headline + CTA hero structure paired with download app / install extension CTA and no explicit trust bar.

Conversion path: Centered Headline + CTA + Pure Typography & Geometry → Download App / Install Extension

Palette · click to copy

5-D design score7.6 / 10
Typography
8.0
Color & Contrast
8.0
Layout & Spacing
8.0
Craft & Polish
7.0
Distinctiveness
7.0

Structure

Fonts
Source Serif 4 / Inter
Primary visual
Pure Typography & Geometry
Social proof
No Explicit Trust Bar
Navigation
Full-Width Top Bar
Theme & density
Light · Airy
Corners & depth
Large Radius · Hairline borders
Preview full AI design brief (includes :root CSS variables & layout rules)Style tokens only; never copy brand names, logos, copy, or images
# Design Brief: Editorial (with Minimal Monochrome)

Oversized serif headlines, narrow reading columns, and magazine-inspired grid layouts.

## Design Tokens

```css
:root {
  --background: #fbf7f0;
  --surface: #ffffff;
  --foreground: #1c1a17;
  --muted-foreground: #6e675f;
  --accent: #c47a2c;
  --radius: 16px;
  --font-heading: "Source Serif 4", serif;
  --font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
}
```

Color area ratio: Background #FBF7F0 (~62%) · Surface #FFFFFF (~18%) · Text #1C1A17 (~10%) · Muted Text #6E675F (~6%) · Accent #C47A2C (~4%). Background and surface dominate the canvas; reserve the accent color for primary buttons and active states.

## Layout & Conversion Structure

- Hero layout: Centered Headline + CTA
- Navigation: Full-Width Top Bar
- Theme & density: Light · Airy
- Border radius & elevation: Large Radius; no drop shadows—separate layers with hairline borders and whitespace
- Primary visual medium: Pure Typography & Geometry
- Conversion CTA: Download App / Install Extension
- Headline hook: Brand Manifesto & Curiosity
- Hero components: Interactive Hero Tool
- Spatial layout notes: Centered Headline + CTA hero structure paired with download app / install extension CTA and no explicit trust bar.
- Visual summary: Editorial (Light canvas, airy density) featuring centered headline + cta layout and pure typography & geometry visuals.

## Avoid

- Generic SaaS hero templates
- Cramped multi-column feature grids
- Neon cyber accents

Implement the UI following the design tokens and layout specifications above: use only these color variables, and reserve the accent color strictly for primary actions and active states. Adopt only this visual style—never copy any reference product’s brand name, logo, copy, or imagery.

Questions & evidence

How much website traffic does writewithharper.com get?
Vaneform estimates 143.1K website visits in 2026-09. Visits can include repeat visits; this estimate measures web traffic separately from paying customers or revenue.Source
What is writewithharper.com and what platforms does it support?
writewithharper.com is catalogued under Grammar & Proofreading: The Free Grammar Checker That Respects Your Privacy. Supported platforms: Browser Extension, CLI / SDK.

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