Utilnaro
Transparent by default

Privacy

Tools on this site process input in two different ways. Every tool is labelled so you can check what happens before you use it.

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Tools that process input on your device

These run inside the page on your own device. Using the tool does not send its input or result to the Utilnaro API, so we cannot store either one.

86 of these tools run entirely in your browser.

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Tools that send input to our server

Some operations require a server-side library or a controlled execution environment. An automated service reads the input only to perform the requested operation and return the result. Input and output are deleted automatically within one hour and are not used to train AI models.

1 run on our server. Input and output are automatically deleted within one hour.

1h

What we keep

Server-side input and output are deleted automatically within one hour. For 30 days we keep the tool used, response status, request id and a coarse size bucket so we can diagnose failures — never file names, entered text or file contents.

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Analytics

Traffic is measured with Matomo, self-hosted by our web host rather than run by an advertising company, and configured without cookies. Nothing is stored on your device and no identifier follows you to other sites. We see which pages were opened, where visitors arrived from and coarse device information — never what you type into a tool, never the files you convert. Your browser Do Not Track signal is honoured. The measurement itself sets no cookie, so there is nothing to consent to for this part; advertising is a separate matter and is covered in the next section.

AD

Advertising and cookies

The site is funded by advertising through Google AdSense. The Google advertising script loads on every page — it is what both reviews the site and later displays the ads, so it is present before any ad is — and it can set cookies and process data about your visit in order to select what to show you. If you are in the EEA or the UK, the Google consent message asks you first and those services do not load until you have chosen. We do not pass anything you type into a tool to it, and we never will: that is the one funding option the whole design rules out.

Tool by tool

Where each tool runs

Tool What happens to your input
Absorbed Dose Converter Processed locally. Your input never leaves your device.
Acceleration Converter Processed locally. Your input never leaves your device.
Add or Subtract Days from a Date Processed locally. Your input never leaves your device.
Age Calculator Processed locally. Your input never leaves your device.
Angle and Slope Converter Processed locally. Your input never leaves your device.
Area Converter Processed locally. Your input never leaves your device.
Atbash Cipher Processed locally. Your input never leaves your device.
Barcode Generator Processed locally. Your input never leaves your device.
Base64 Encode / Decode Processed locally. Your input never leaves your device.
C# Formatter Processed locally. Your input never leaves your device.
Caesar Cipher Online Processed locally. Your input never leaves your device.
Capacitance Converter Processed locally. Your input never leaves your device.
Case Converter Processed locally. Your input never leaves your device.
Countdown Processed locally. Your input never leaves your device.
CSS Formatter Processed locally. Your input never leaves your device.
Data Size Converter Processed locally. Your input never leaves your device.
Data Transfer Rate Converter Processed locally. Your input never leaves your device.
Date Difference Calculator Processed locally. Your input never leaves your device.
Daylight Saving Time Lookup Processed locally. Your input never leaves your device.
Density Converter Processed locally. Your input never leaves your device.
Electric Charge Converter Processed locally. Your input never leaves your device.
Electric Current Converter Processed locally. Your input never leaves your device.
Electricity Cost Calculator Processed locally. Your input never leaves your device.
Energy Converter Processed locally. Your input never leaves your device.
Equivalent Dose Converter Processed locally. Your input never leaves your device.
Flow Rate Converter Processed locally. Your input never leaves your device.
Force Converter Processed locally. Your input never leaves your device.
Fraction Calculator Processed locally. Your input never leaves your device.
Frequency and RPM Converter Processed locally. Your input never leaves your device.
Fuel Economy Converter Processed locally. Your input never leaves your device.
GCD and LCM Calculator Processed locally. Your input never leaves your device.
Hash Generator Processed locally. Your input never leaves your device.
HMAC Generator Processed locally. Your input never leaves your device.
HTML Formatter Processed locally. Your input never leaves your device.
Illuminance Converter Processed locally. Your input never leaves your device.
JavaScript Formatter Processed locally. Your input never leaves your device.
JSON Formatter Processed locally. Your input never leaves your device.
JSON Validator Processed locally. Your input never leaves your device.
JWT Decoder Processed locally. Your input never leaves your device.
Length Converter Processed locally. Your input never leaves your device.
Letter Frequency Analysis Processed locally. Your input never leaves your device.
Luminance Converter Processed locally. Your input never leaves your device.
Margin and Markup Calculator Processed locally. Your input never leaves your device.
Markdown Editor & Preview Processed locally. Your input never leaves your device.
Mass to Volume Calculator Processed locally. Your input never leaves your device.
Meeting Planner Processed locally. Your input never leaves your device.
Moon Phase Processed locally. Your input never leaves your device.
Online Stopwatch Processed locally. Your input never leaves your device.
Online Timer Processed locally. Your input never leaves your device.
Percentage Calculator Processed locally. Your input never leaves your device.
Polish Salary Calculator (gross to net) Processed locally. Your input never leaves your device.
Power Converter Processed locally. Your input never leaves your device.
Pressure Converter Processed locally. Your input never leaves your device.
Proportion Calculator Processed locally. Your input never leaves your device.
Python Formatter Processed locally. Your input never leaves your device.
QR Code Generator Processed locally. Your input never leaves your device.
Radioactivity Converter Processed locally. Your input never leaves your device.
Resistance Converter Processed locally. Your input never leaves your device.
Roman Numeral Converter Processed locally. Your input never leaves your device.
Rounding Calculator Processed locally. Your input never leaves your device.
Secure Password Generator Processed locally. Your input never leaves your device.
Speed and Pace Converter Processed locally. Your input never leaves your device.
SQL Dialect Converter Your input is uploaded to our server, processed there, and automatically deleted within one hour.
Sunrise and Sunset Processed locally. Your input never leaves your device.
Temperature Converter Processed locally. Your input never leaves your device.
Text Diff Processed locally. Your input never leaves your device.
Time Converter Processed locally. Your input never leaves your device.
Time Zone Converter Processed locally. Your input never leaves your device.
Torque Converter Processed locally. Your input never leaves your device.
Trip Fuel Cost Calculator Processed locally. Your input never leaves your device.
TypeScript Formatter Processed locally. Your input never leaves your device.
Unit Converter Processed locally. Your input never leaves your device.
Unix Timestamp Converter Processed locally. Your input never leaves your device.
UUID Generator Processed locally. Your input never leaves your device.
VAT Calculator Processed locally. Your input never leaves your device.
Vigenere Cipher Processed locally. Your input never leaves your device.
Voltage Converter Processed locally. Your input never leaves your device.
Volume Converter Processed locally. Your input never leaves your device.
Weight and Mass Converter Processed locally. Your input never leaves your device.
Weighted Average Calculator Processed locally. Your input never leaves your device.
Word Counter Processed locally. Your input never leaves your device.
Working Days Calculator Processed locally. Your input never leaves your device.
World Clock Processed locally. Your input never leaves your device.
XML Formatter Processed locally. Your input never leaves your device.
XML Validator Processed locally. Your input never leaves your device.
XPath Tester Processed locally. Your input never leaves your device.
YAML Formatter Processed locally. Your input never leaves your device.

Questions

If something here is unclear or looks wrong, say so — a privacy policy nobody can check is worth nothing.