Free · No sign-up · Private by design
Free online tools that respect your privacy
Compress images, work out loan EMIs, format JSON, make QR codes and more. Everything runs in your browser, so your files and numbers never leave your device.
- 10
- free tools
- 4
- categories
- 0
- files uploaded
- 0
- accounts needed
Browse
Find the right tool
Four groups of tools for everyday jobs.
Image Tools
Compress, resize and convert images directly in your browser. Files never leave your device.
3 tools
Finance Calculators
Calculators for loans, deposits, tax and everyday percentages.
4 tools
Developer Tools
Handy utilities for formatting and validating developer data.
1 tool
Utilities
Small everyday tools such as QR codes and word counting.
2 tools
Most used
Featured tools
Start with these favourites.
Image Compressor
Reduce image file size while keeping quality, entirely in your browser.
Image ToolsOpen
EMI Calculator
Work out the monthly EMI, total interest and total payment for a loan.
Finance CalculatorsOpen
JSON Formatter and Validator
Format, minify and validate JSON with clear error messages.
Developer ToolsOpen
Why OEWER Tools
Built to be fast, clear and private
Private by design
Files and numbers are processed in your browser. Nothing you type or choose is uploaded to a server.
Instant results
No sign-up, no queues and no waiting. Results update as you type, and large jobs run on your own device.
Explained, not just answered
Every tool comes with the formula, worked examples and answers to common questions, so you can trust the result.
Works everywhere
Designed for phones, tablets and desktops. Use keyboard, touch or a screen reader.
How it works
Three steps, no sign-up
Pick a tool
Search or browse the categories to find what you need.
Enter or choose your data
Type your numbers or text, or choose an image. It never leaves your device.
Get the answer
See the result straight away, then copy it or download the file.
Guides
Latest articles
Plain-language explainers to go with the tools.
Money Guides29 October 2026
How EMI Is Calculated
Understand the formula behind your loan EMI and how interest and tenure change what you pay.
1 min readRead
How-To28 October 2026
Why Browser-Based Tools Keep Your Files Private
Some online tools upload your files to a server to process them. Others do the work on your own device. Here is how to tell the difference and why it matters.
1 min readRead
How-To24 October 2026
How to Make a QR Code That Scans Every Time
A QR code that will not scan is worse than none at all. Follow these simple rules for size, colour and error correction.
1 min readRead
Questions
Frequently asked questions
Short answers about how the tools work and what happens to your data.
Are the tools really free?
Yes. Every tool is free to use with no sign-up and no limits on how often you use it.
Are my files or text uploaded anywhere?
No. The tools run in your browser on your own device. Your images, text and numbers are never sent to our servers.
Do I need to create an account?
No. Open a tool and use it. There is nothing to install and no account to make.
How accurate are the calculators?
They use the standard formulas, which are shown on each tool page along with worked examples. Banks and tax authorities may round differently, so treat results as close estimates.
Which browsers and devices work?
Current versions of Chrome, Edge, Firefox and Safari on phones, tablets and computers. A few features, such as creating WebP images, depend on the browser.
Ready to get something done?
Pick a tool and have your answer in seconds. It is free, and your data stays with you.
Browse all tools