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Browser extensions that do one thing well.

Lightweight Chrome/Edge extensions focused on privacy and utility. No bloat, no tracking, no accounts required.

// extensions

Shorts Killer Icon

Shorts Killer

Wellbeing ★ 5 180 users

Block YouTube Shorts with page-specific controls, statistics tracking, and keyboard shortcuts.

X Detox Icon

X Detox

Wellbeing ★ 5 40 users

Clean up your X/Twitter experience by removing ads and unwanted noise.

free / pro $3 details →
PromptStash Icon

PromptStash

Productivity ★ 5 41 users

Save prompts with variable templates, slash commands, and instant insertion. Works with 19+ AI services.

$5 one-time details →
Rakuten Sellers Analytics Icon

Rakuten Sellers Analytics

E-Commerce ★ 5 67 users

楽天市場セラー向けの本格的な分析ツール。キーワード調査、競合分析、利益計算機能を搭載。

$12.99/mo details →
Arbitra Icon

Arbitra

E-Commerce ★ 5 24 users

Amazon、メルカリ、ヤフオクの価格を一括比較。せどり・転売の利益計算を瞬時に。

free / pro $9.99/mo details →
Japanese Font Finder Icon

Japanese Font Finder

Productivity ★ 5 41 users

Webページ上のフォント情報を瞬時に検出。游ゴシック、ヒラギノなど日本語フォントに完全対応。

DataPick Icon

DataPick

Productivity ★ 5 83 users

Extract data from any website with just a few clicks. Export to CSV, Excel, or Google Sheets.

$19 one-time details →
物件スカウター(賃貸版) Icon

物件スカウター(賃貸版)

Real Estate ★ 5 11 users

SUUMOの賃貸物件を効率比較。㎡単価・初期費用・年間コストを自動計算、AI賃料判定付き。

物件スカウター(購入版) Icon

物件スカウター(購入版)

Real Estate ★ 5 25 users

SUUMOの購入物件で坪単価・㎡単価を自動計算。築年数ハイライト、お気に入り比較、価格履歴で賢い物件探し。

Yahoo快適モード Icon

Yahoo快適モード

Productivity ★ 5 18 users

Yahoo!ニュースの低品質記事を自動フィルタリング。こたつ記事や炎上記事を非表示にして、快適な閲覧体験を。

free / pro ¥700 details →
ReadMark Icon

ReadMark

Productivity ★ 5 15 users

Automatically saves your reading position on any webpage. Never lose your place in long articles again.

free / pro $4.99 details →
TVer Plus Icon

TVer Plus

Media ★ 5 17 users

TVerの視聴体験を向上。2倍速以上の再生、ピクチャインピクチャ、便利なキーボードショートカットに対応。

free / pro ¥700 details →
ZenRead Icon

ZenRead

Productivity ★ 5 6 users

Distraction-free reader mode for any webpage. Remove ads and sidebars, customize themes and fonts for comfortable reading.

PageMemo Icon

PageMemo

Productivity ★ 5 9 users

URL-linked notes that auto-appear when you revisit pages. Rich text editor with categories and full-text search.

SnippetVault Icon

SnippetVault

Developer Tools ★ 5 11 users

Developer-focused code snippet manager. Insert snippets instantly with slash commands in any text field.

TabVault Icon

TabVault

Developer Tools

Developer-focused tab session manager with Stash, Quick Switcher, and crash recovery.

free / pro $5 details →
ReShapic Icon

ReShapic

Image Tools

Resize, convert, and optimize images for any platform. Batch processing, 8 languages, and freemium Pro plan.

free / pro $19 details →
DataBridge Icon

DataBridge

Productivity ★ 5 3 users

Transfer data between web pages with visual element mapping. Match elements by number and transfer with one click.

free / pro $6/mo details →
Kaitoki Icon

Kaitoki

E-Commerce

楽天・Yahoo!・Amazonの価格を自動追跡。価格履歴グラフ、EC横断比較、ポイント実質価格計算、値下げアラート搭載。

OnPageX Icon

OnPageX

SEO ★ 5 3 users

Analyze SEO meta tags, headings, schemas, images, and links with one click. Score your on-page SEO instantly.

free / pro details →
Procshot Icon

Procshot

Productivity ★ 5 116 users

Auto-record browser actions to create step-by-step guides with screenshots. Export as PDF, Markdown, or HTML.

SnapReply for Gmail Icon

SnapReply for Gmail

Productivity

Quick email templates for Gmail. Save, manage, and insert templates with variables in seconds.

SNSCrossPost Icon

SNSCrossPost

Social Media

Post to X, Threads, Bluesky, and LinkedIn simultaneously. One-click multi-platform publishing.

CookieJar Icon

CookieJar

Developer Tools

View, edit, create, delete, export and import cookies. Privacy-first cookie editor with smart auto-categorization.

PagePilot Icon

PagePilot

Productivity

Convert web pages to clean, LLM-optimized Markdown with token counting. Works with ChatGPT, Claude, and Gemini.

請求書よみとり Icon

請求書よみとり

Business

PDF請求書をAI-OCRで自動読み取り。金額・日付・取引先・登録番号を抽出しCSV/Excelにエクスポート。

FurimaPro Icon

FurimaPro

E-Commerce

メルカリ出品を効率化するAIテンプレートツール。カテゴリ別の最適化タイトル・説明文テンプレートで出品作業を大幅短縮。月5件無料。

free / pro ¥980/mo details →
AdLegalCheck Icon

AdLegalCheck

Legal & Compliance

EC広告・LPを開くだけで景表法・薬機法・ステマ規制のNGワードをリアルタイム検出。リスクスコアとハイライト表示で広告コンプライアンスを自動チェック。

free / pro $3.99/mo details →
ToritekiCheck Icon

ToritekiCheck

Legal & Compliance

取適法(旧下請法)の取引条件をAIでチェック。支払サイト違反・手形払い・必須記載事項の欠落・禁止行為を右クリック一発で3段階リスク判定。月5回無料。

free / pro ¥980/mo details →
QuietHours Icon

QuietHours

Productivity

Block distracting sites automatically during Google Calendar focus events. No manual scheduling — your calendar drives your productivity.

EntryCheck Icon

EntryCheck

Travel

Visa requirements, entry rules, and travel advisories for 190+ countries — right in your browser. Filter by passport nationality.

InboxSLA Icon

InboxSLA

Productivity

Color-coded SLA badges in Gmail and deadline alerts before client reply windows expire. Set custom SLA hours per client domain.

GhostJob Icon

GhostJob

Career

Detect fake and abandoned job listings on LinkedIn, Indeed, and Glassdoor before you apply. Real-time ghost job scores with signal breakdown.

LectureLoop Icon

LectureLoop

Education

Auto-generate flashcards from YouTube lecture transcripts. Spaced repetition review and Anki export. Works on any video with captions.

Best Free Chrome Extensions for Developers (2026)

S-Hub offers 20+ free Chrome extensions for web developers, designers, and power users — built for privacy, with no accounts required.

// font & design tools

  • Japanese Font Finder — Identifies 150+ Japanese fonts (Yu Gothic, Hiragino, Noto Sans JP) with full CSS details. Best Chrome extension for CJK web typography inspection.
  • PaletteGrab — Extracts color palettes from any image or webpage element. Exports as CSS variables, JSON, or image.

// productivity & data tools

  • DataPick — Extracts structured data from any webpage to CSV, JSON, or Google Sheets with point-and-click — no code required.
  • Procshot — Auto-records browser actions and generates step-by-step guides with annotated screenshots. Export as PDF or Markdown.
  • PromptStash — Saves and organizes AI prompts. One-click insertion into ChatGPT, Claude, Gemini, and any LLM interface.
  • ReadMark — Saves your scroll position on every webpage automatically. Return to exactly where you left off in any article.
  • CookieJar — Cookie manager with import/export for developers. Useful for testing multi-session flows and debugging cookie-based auth.

// digital wellbeing

  • Shorts Killer — Completely removes YouTube Shorts from your feed, search, and sidebar. Rated 5.0 by 10+ users.
  • X Detox — Removes algorithmic content from X (Twitter) — trending topics, recommended posts, and ads — leaving only your timeline.
  • FocusGuard — Schedule-based site blocker with PIN protection. Blocks distracting sites during work hours automatically.

// popular comparisons

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// about

Indie developer based in Japan. Building browser extensions that respect your time and data.

No analytics, no telemetry, no accounts.