Free, privacy-first
online tools.
Calculators, converters and generators.
Zero upload. Zero tracking.
Client-side processing • No cookies • Always free
Developer Tools
Formatters, encoders, converters and utilities for developers and engineers.
Security & Encryption
Password generators, hash calculators, encryption tools and key generation utilities.
PDF Tools
Merge, split, compress and transform PDF documents directly in your browser.
Image & Media
Edit, optimize, convert and analyze images and media files client-side.
Finance & Business
Investment calculators, business analysis tools, and loan estimators.
Health & Fitness
Body calculators, nutrition trackers and fitness planning tools.
Text & Data
Text manipulation, data conversion and generator utilities.
Matching Tools
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Featured Tools
AI Prompt Builder & Template Generator | Free Online Tool
Create and format effective AI prompts for Midjourney and ChatGPT with our free online tool. Easy to...
Privacy Policy Generator
Generate a free custom GDPR and CCPA compliant privacy policy for your website or app instantly. No ...
Compress PDF Files Online — Free and Private | MultiTools
Compress PDF files quickly and securely to save space and time. Perfect for email, uploads, and stor...
Free ROI Calculator Online — Optimize Investment Returns | MultiTools
Calculate ROI quickly and securely with our online tool. Gain insights on your investments with no d...
Compare File Hashes Online for Free — Secure & Private | MultiTools
Compare SHA-256 file hashes securely online. Ensure file integrity, protect privacy with no uploads....
AI Token Counter for ChatGPT, GPT-4 & Claude — Free | MultiTools
Count tokens for GPT-4, ChatGPT, Claude & Llama instantly. Estimate API costs, check context limits....
What is MultiTools?
MultiTools is a free collection of 102+ online tools for everyday tasks — from formatting messy JSON and creating strong passwords to merging PDFs and checking your BMI. Everything works right in your browser. No downloads, no accounts, no data uploaded anywhere.
Most tool websites ask you to upload your files to their servers. That means your confidential documents, personal data, and sensitive information pass through systems you don't control. MultiTools works differently: everything is processed on your own device. Your files and data never leave your machine — period.
Need to verify a download is authentic, count tokens before sending an AI prompt, figure out how your savings will grow, or shrink images for your website? Open the tool, get your result, done. No sign-up forms, no "free trial" limits, no surprises.
Browse 7 categories to find what you need: Developer Tools for coding tasks, Security & Encryption for protecting your data, PDF Tools for document work, Image & Media for visuals, Finance & Business for money decisions, Health & Fitness for wellness, and Text & Data for everyday text tasks.
Your Data Stays on Your Device
Most tool websites upload your files to their servers. We don't. Everything happens right here in your browser.
Nothing Gets Uploaded
Your files, passwords, calculations, and personal data never leave your device. There are no servers on our end that see your information. This makes MultiTools safe for confidential documents, sensitive health data, financial planning, and anything else you'd rather keep private.
No Tracking, No Cookies
We don't track you, follow you around the web, or sell your data. There's no account to create and nothing to opt out of. Open a tool, get your result, close the tab. That's it.
Instant Results
Because everything runs on your device, results appear immediately. No upload progress bars, no "please wait while we process your file," no spinning wheels. Even with large files, you get answers in seconds.
Works Offline Too
Once a tool is loaded, it keeps working even without an internet connection. On a plane, in a coffee shop with spotty WiFi, or in a restricted network — your tools stay available.
How It Works
Open any tool, do your thing, and get the result — it's that simple. When you select a file, type in numbers, or paste text, everything is processed right here on your device. Nothing is uploaded, nothing is stored, nothing is shared. You can close the tab when you're done and there's no trace left anywhere.
This approach gives you the convenience of a web app with the privacy of desktop software. Need to generate a file hash, encrypt a document, or create SSH keys? Your secrets stay on your machine. Need to merge PDFs or compress images? Same thing — your files never touch a remote server.
No installation, no subscription, no data leaks. Just open and use.