Per-app speed limits
Set download and upload speed separately for every program. Enter the value in KB/s, MB/s or Mbit/s.
You decide how much internet each program gets
Stop the updater from choking your connection while you game. Interlimiter caps the download and upload speed of each program separately, and blocks the ones you don't want online at all.
Download free
Windows 10 and 11 · No ads · Set up in a minute
- Per-app speed limits
- One-click internet block
- Live speed graph
What it does
Block internet access
Stop a program from reaching the internet. The block survives closing the app and restarting the computer.
Live speed graph
See what each program is downloading right now. It takes seconds to find out who is filling your connection.
Runs in the background
Close the window and it moves to the system tray with your rules still enforced. It can start with Windows if you want.
Remembers your rules
Your limits and blocks are saved and restored, so they are still there after a reboot.
10 languages, no clutter
No networking knowledge needed. Pick the program from the list, type the limit, done. The interface speaks 10 languages and follows the Windows light or dark theme.
See what it connects to
Select a program and the side panel shows its rule, total traffic and the connections it has open right now — which address, which protocol. All your rules are listed on the Rules page in the side navigation.
Screenshots
Free and Pro
Blocking and speed limits work fully in the free version, with no limit on how many programs you can add. Pro runs your rules for you with quotas, schedules, profiles and overage alerts.
| Feature | Free | Pro |
|---|---|---|
| Unlimited program blocking | Yes | Yes |
| Unlimited download/upload limits | Yes | Yes |
| Live speed graph | Yes | Yes |
| System tray, start with Windows | Yes | Yes |
| Scheduling (lift limits at night) | No | Yes |
| Quotas (e.g. cut off or slow down after 5 GB a day) | No | Yes |
| Profiles (Gaming, Meeting) | No | Yes |
| Overage alerts (warns before a quota runs out) | No | Yes |
Our promise: no feature marked “Yes” in the Free column will ever move to Pro in a later version. The free version never expires and has no ads, account or sign-up.
$14.99
One-time payment, 3 computers. All 1.x updates included.
Checkout opens soon. The Pro features already work in the app; you will be able to buy Pro here as soon as checkout opens. Until then every feature of the free version can be used with no time limit.
Pro is a one-time payment, not a subscription.
Download
Windows 10 and 11 (64-bit). Setup asks for administrator rights because the app installs a network driver. The installer is not code-signed yet: if Windows SmartScreen warns, choose “More info” → “Run anyway”. You can check that the file reached you unchanged with the SHA-256 below.
Version 1.0.4 · 24.7 MB · Changelog
SHA-256: 486edcf5006fe5e65abea3fbc45d9fb1c4cd41761c28878297560857e149325d
VirusTotal scan (2026-09-30): 3 detections from 71 antivirus engines. The detections are automated (heuristic) guesses common for unsigned programs; Microsoft's has been reported as a false positive. The network driver the program uses (WinDivert) is listed as a “risk tool” by some antivirus products. View report
Guides
The things people do most often with Interlimiter, step by step and with screenshots. All of it works in the free version.
Limit a program's internet speed
Cap the download and upload speed of one program and leave everything else at full speed.
Block a program's internet access
Stop a program from going online with one click, and allow it again whenever you want.
What is using my bandwidth?
See which program is filling your connection in real time and inspect the addresses it is talking to.
Stop background downloads lagging your games
When a game update or cloud sync fills your connection, your game lags. Cap the download instead of stopping it.
Save mobile data on a hotspot
When you tether to your phone, find the programs using data in the background and block or slow them down.
Frequently asked questions
Is it really free? Are there ads?
The free version has no ads, no trial period and no limit on how many programs you can block. Pro is optional.
Why does it need administrator rights?
To see and slow down each program's traffic, a driver (WinDivert) is installed into the Windows network layer, which is not possible without administrator rights. Many well-known network tools use the same driver.
What if my antivirus warns me?
Programs that use a network driver can trigger warnings in some antivirus products. Download the installer only from this site and compare it with the SHA-256 value shown on the page.
How accurate are the speed limits?
In our measurements the real speed stays within roughly five to ten percent of the target. Download limiting is indirect: the server cannot be told to slow down, so incoming packets are delayed instead. That makes the speed fluctuate a little around the target.
Will it slow my computer down?
If you have not set any limits, traffic is only monitored and never touched. On very fast connections (above roughly 120 Mbit/s) a program you have limited cannot exceed that ceiling.
What happens to my rules if I uninstall it?
“Remove all rules” in the app deletes every firewall rule it created. Your own firewall rules are never touched.
Which languages does it support?
The interface is available in English, Turkish, Chinese, Spanish, Arabic, Portuguese, French, Russian, German and Hindi. It picks your Windows language on first run and you can change it from the Settings menu.
I blocked a program but ping still works?
On Windows, the ping command does not send its packets itself — the operating system kernel sends them. That is why no per-application firewall rule, including ours, can stop ping. Test the block with a browser or a downloader instead.
Can I get a refund if I buy Pro?
Yes. Write to us within 14 days of your purchase and we refund it, no questions asked. The payment provider returns the money to the same card. The free version never expires anyway, so you can try it first and decide later.