Use TabBench offline
Save the tools on your phone or computer and they keep working with no connection: on a plane, underground, or wherever the signal drops. 125 of the 129 tools work without a connection.
How it works
- Every tool page you open is saved on this device as you use it, so the tools you use most already work offline.
- Saving everything above makes every tool ready, including ones you have not opened yet.
- When TabBench is updated, your saved copy is refreshed the next time you are online. Only what changed is downloaded.
- Your notes, history and settings are kept in your browser, online or not.
On your phone
Add TabBench to your home screen so it opens like an app, full screen and without the browser bar. On iPhone and iPad this matters more: Safari can clear saved site data after about a week without a visit, but keeps it for sites added to the Home Screen.
Tools that need a connection
- API Request Builder: it sends requests to the APIs you test.
- Internet Speed Test: it measures your connection.
- Currency Converter: exchange rates come from the internet (offline, it shows the last rates it saved, with their date).
- Speech to Text: most browsers recognise speech on a server.
The AI tools (Image to Text (OCR), AI Code & Formula Explainer, AI Text Summarizer, AI Text Rewriter, AI Text Simplifier, AI Keyword Extractor, AI JSON Explainer) work offline in their on-device mode. Only their optional cloud AI mode needs a connection.
Tools that work offline
Calculators & Finance
Tip & Bill Split Calculator · Fuel Cost Calculator · Percentage Calculator · GST Calculator · EMI Calculator · Discount Calculator · SIP Calculator · Compound Interest Calculator · BMI Calculator · CTC to In-Hand Salary Calculator · Scientific Calculator · Unit Converter
PDF & Documents
Image to PDF Converter · PDF to Word Converter · Unlock PDF · Merge PDF · PDF Page Counter & Inspector · Split PDF · PDF to JPG Converter · Rotate PDF · Add Page Numbers to PDF · PDF Editor
Image & Media
QR Code Generator · QR Code Scanner · Barcode Generator · Barcode Scanner · Compress Image · Remove Watermark · PNG to JPG Converter · PNG to SVG Converter · JPG to PNG Converter · Image to WebP Converter · WebP to JPG Converter · Crop Image · Resize Image · Favicon Generator · Video Player · Audio Player · Cut Video · Remove Audio from Video · Aspect Ratio Calculator · EXIF Metadata Viewer · Online Camera
Text & Writing
Word Counter · Case Converter · Text Diff Checker · Online Notepad · Text to Speech · Lorem Ipsum Generator · URL Slug Generator · Text Sorter & Duplicate Remover
Date & Time
Countdown Timer · Pomodoro Timer · HIIT & Tabata Interval Timer · World Clock & Meeting Planner · Work Hours Calculator · Age Calculator · Date Difference Calculator · Business Days Calculator · Unix Timestamp Converter · Online Stopwatch · Time Format Converter
Business & Marketing
Profit Margin Calculator · UTM Builder · Break-Even Calculator
Random & Games
Coin Flip · Dice Roller · Random Number Generator · Random Name Picker & Wheel
AI Tools
LLM Token Counter · AI Prompt Optimizer · AI Function Calling Schema · Prompt & Context Cleaner · Image to Text (OCR) · AI Code & Formula Explainer · AI Text Summarizer · AI Text Rewriter · AI Text Simplifier · AI Keyword Extractor · AI JSON Explainer
Developer & Data
Regex Builder · SQL Formatter · JSON to YAML Converter · Chmod Permissions Calculator · Docker Run to Compose · CSS Box Shadow Generator · Glassmorphism Generator · PX to REM Converter · SVG to Data URI Converter · Color Palette Generator · JSON Formatter · Base64 Encoder & Decoder · JWT Decoder · UUID Generator · URL Encoder & Decoder · Sample File Generator · JSON to CSV Converter · Regex Tester · HTML Entity Encoder & Decoder · Color Converter · JSON to TypeScript Converter · Cron Expression Explainer · Color Contrast Checker · Markdown Table Generator
API, HTTP & Network
HTTP Status Code Lookup · HTTP Header Analyzer · HTTP Header Generator · User-Agent Parser · URL Parser · Query String Parser · Query String Builder · cURL Command Generator · cURL to Fetch Converter · cURL to Axios Converter · cURL to Python Converter · cURL to JavaScript Converter · HTTP Method Reference · MIME Type Lookup · Content-Type Header Checker · Subnet Calculator · MAC Address Lookup · IPv4 to IPv6 Converter · SSL Certificate Decoder