100% Client-Side • No Uploads

Unit Converter Free

Universal unit converter with 12 categories and 100+ units. Convert length, weight, temperature, volume, area, speed, time, pressure, energy, power, data storage, and angles. Real-time conversion as you type.

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Your Files Stay Private

Never uploaded to any server. Processing happens entirely in your browser.

No Size Limits

Process files of any size — limited only by your browser memory.

No Account Required

Start immediately. No signup, no email, no tracking.

Works Offline

After first load, the tool works without internet connection.

Why Choose NativeSmith?

Built different from traditional online tools. No compromises on privacy or usability.

1

12 categories: length, mass, temperature, volume, area, speed, time, pressure, energy, power, data, angle

2

100+ units including metric, imperial, and scientific

3

Real-time conversion as you type

4

Swap from/to with one click

5

Common conversions quick-access

6

Works offline after first load

How It Works

Three simple steps to convert your value.

1

Add Value

Enter or paste your value. Add as much as you need.

2

Configure Options

Adjust settings like quality, format, or page selection as needed.

3

Download Result

Click process and instantly get your convertd value. Done — no waiting, no email required.

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Frequently Asked Questions

Are my conversions sent to a server?

No. All calculations happen in your browser. No data leaves your device.

How accurate are the conversions?

Uses standard conversion factors. Temperature uses exact formulas. Precision up to 10 decimal places.

Can I convert between any two units?

Yes, within the same category (e.g., length to length). Cross-category conversions (e.g., length to mass) are not physically meaningful.

Does it support scientific notation?

Yes, enter values like 1.5e3 or 1.5E-3 and results display in scientific notation when appropriate.

Are there any uncommon units?

Includes light-years, astronomical units, parsecs, carats, stones, barrels, BTUs, horsepower, and more.

Need More Power?

Upgrade to Pro Pass for advanced features.

  • Custom unit definitions
  • Conversion history
  • Batch convert multiple values
  • API access
Upgrade to Pro Pass — $4.99/month

Ready to convert Your Value?

Start using NativeSmith — your files never leave your browser.

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