ToolShelf

55+ offline tools in your browser sidebar. JSON formatter, Base64, UUID, password generator, image resizer, unit converter & more.

🔧 ToolShelf — Your All-in-One Offline Toolbox Everything developers, designers, and power users need — right in your browser sidebar. No internet required. No sign-up. No data collection. 100% free. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🛠️ DEVELOPER TOOLS (14 tools) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✔ JSON Formatter & Validator — format, minify, and validate JSON instantly ✔ Base64 Encode / Decode — encode text or files to Base64 and back ✔ URL Encoder / Decoder — encode/decode URLs and URI components ✔ UUID Generator — generate UUIDs v4 instantly, single or batch ✔ Hash Generator — MD5, SHA-1, SHA-256, SHA-512 hashing ✔ Regex Tester — test regular expressions with live match highlighting ✔ Color Picker — pick colors with HEX, RGB, HSL output ✔ Gradient Generator — create CSS gradients visually ✔ HTML Entity Encoder — encode/decode HTML special characters ✔ JWT Decoder — decode and inspect JWT tokens, check expiry ✔ JSON ↔ CSV Converter — convert between JSON arrays and CSV ✔ Number Base Converter — Binary, Octal, Decimal, Hex converter ✔ Cron Expression Builder — visual cron builder with presets ✔ URL Parser & Inspector — break URLs into components, edit query params ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📝 TEXT TOOLS (10 tools) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✔ Text Case Converter — UPPER, lower, Title, camelCase, snake_case, kebab-case ✔ Word Counter — words, characters, sentences, reading time, unique words ✔ Remove Duplicate Lines — deduplicate with case-insensitive and sort options ✔ Sort Lines — alphabetical, length, reverse, shuffle ✔ Reverse Text — reverse characters, words, lines, or flip each word ✔ Remove Extra Spaces — trim, collapse, remove blank lines ✔ Find & Replace — with regex mode, whole-word, and case-sensitive options ✔ Lorem Ipsum Generator — customizable placeholder text ✔ Markdown Editor — live split-pane preview with offline rendering ✔ Text Diff Checker — compare two texts line-by-line with change highlights ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔄 CONVERTER TOOLS (8 tools) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✔ Unit Converter — length, weight, temperature, area, volume, speed ✔ Timestamp Converter — Unix timestamps to human-readable dates and back ✔ Currency Reference — major currency codes reference ✔ Quick Calculator — expression calculator with history ✔ QR Code Generator — create QR codes from any text, with SVG download ✔ Password Generator — random passwords + name-based memorable passwords + bulk ✔ Percentage Calculator — 5 calculation modes: discount, increase, % change ✔ Age & Date Calculator — exact age calculation, date difference, next birthday ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🖼️ IMAGE TOOLS (6 tools) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✔ Image Resizer — resize images to exact dimensions, all offline ✔ Image Compressor — reduce file size with quality control ✔ Format Converter — convert between JPG, PNG, WebP, BMP, GIF ✔ Crop & Rotate — crop images to custom dimensions, rotate and flip ✔ Color Extractor — extract dominant colors from any image ✔ SVG & Base64 — convert images to Base64 data URIs ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🌐 BROWSER TOOLS (9 tools) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✔ Tab Manager — view and manage all open tabs across windows ✔ Duplicate Tab Finder — find and close duplicate tabs instantly ✔ Sleeping Tabs — identify memory-heavy tabs ✔ Workspace Saver — save and restore groups of tabs as workspaces ✔ Session Restore — restore recently closed tabs and windows ✔ Bookmark Cleaner — find and remove duplicate or broken bookmarks ✔ History Search — search your browser history (optional permission) ✔ Cookie Manager — view and delete cookies (optional permission) ✔ Open All URLs — paste a list of URLs and open them all in new tabs ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚡ PRODUCTIVITY TOOLS (8 tools) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✔ Clipboard History — track your recent clipboard entries ✔ Notes — rich text note-taking, saved locally ✔ Todo List — task manager with priority and completion tracking ✔ Pomodoro Timer — 25/5 minute focus timer with notifications ✔ Calendar — monthly calendar view ✔ Multi Search — search Google, YouTube, Amazon, Reddit simultaneously ✔ Quick Calculator — instant math with expression history ✔ Bookmark Manager — organize and search your bookmarks ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔒 PRIVACY — 100% LOCAL ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Zero network requests — all tools run entirely in your browser • Zero data collection — no analytics, no tracking, no telemetry • Zero sign-up required — works immediately after install • Your data never leaves your device ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 💡 HOW TO USE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1. Click the ToolShelf icon in your Chrome toolbar 2. The sidebar opens on the right side of your browser 3. Search for any tool or browse by category 4. Use any tool instantly — no loading, no internet needed Built for developers, designers, writers, and anyone who gets tired of switching between 20 different websites for simple tasks.