Know what your internet really delivers.

Scheduled speed tests, charted over time. Every result stays on your computer.

Download View on GitHub

Internet Speed Monitor monitoring on an hourly schedule, with the latest results, medians and a chart of recent tests

3operating systems: Windows, macOS and Linux

0accounts, sign-ups or cloud uploads

5 minshortest schedule preset, or write your own cron

Freeand open source under the Unlicense

Proof beats guessing.

Hold your ISP to its promise

Compare the speed you pay for with the speed you get, hour by hour and week by week.

Keep video calls steady

Spot the dips that drop calls, and see when they happen.

Back up a complaint

Export a date range to CSV and attach it to the support ticket.

Gamers checking latency
Creators watching upload speed
Students on online classes

Charts

See every dip and spike.

Chart the last 20 tests, the last day, the last 7 days or any date range. Medians show your typical speed, not one lucky run.

Read the user manual

Chart of download and upload speed over the last 7 days

Every result, fully described.

Each test records download, upload, ping, server, network interface and ISP. Tell a Wi-Fi problem from an ISP problem at a glance.

Table of recent speed tests with time, download, upload, ping, server, network interface and ISP

Your data stays yours.

Everything is stored locally. Export to CSV, or preview exactly what will be removed before clearing old data.

Export Speed Test Data dialog with start and end dates and the number of records to export — Export everything, or a date range.

Clear Data Until Date dialog previewing how many tests will be removed and kept — See what goes before it goes.

Set it and forget it.

Flexible scheduling

A simple interval or a cron expression, with presets for 5m, 15m, 30m, 1h and work hours.

Test Once Now

Run a single test on demand without starting monitoring.

Smart status

See whether it is running, sleeping or stopped, and when the next test starts.

Median statistics

Median speeds across your recent history show what is typical.

Network detection

Detects Wi-Fi, Ethernet and other interface types for every test.

ISP lookup

Identifies your provider for each test, so you can track it over time.

Local storage

No cloud, no account. History lives on your device.

Cross-platform

One native app for Windows, macOS and Linux.

Open source

Native, light and verifiable.

One native binary with no bundled browser, so it starts instantly. Read the code, or build it yourself.

RustA fast, memory-safe language. One native binary per platform.
eguiImmediate-mode GUI toolkit behind the interface and interactive charts.
TokioAsync runtime. Tests and lookups run in the background.
Fast.comNetflix's speed test, measured against its global CDN.

Download Internet Speed Monitor

Free for Windows, macOS and Linux. Upgrading from 1.x? Install as usual. Your history and settings carry over.

Current version: v2.0.0 · Release notes

macOS (Apple Silicon) .dmg file macOS (Intel) .dmg file Windows .exe installer Linux .deb package