# Can You Play Browser Games Offline? We Cut the Internet on 28 Games

> Can you play browser games offline? Once loaded, yes: none of 28 games stopped when we cut the internet. How to play offline and what does not work.

- Source: https://yesthisgame.com/blog/play-browser-games-offline/
- Published: 2026-10-24, updated: 2026-10-24
- Author: Yes This Game (the team that makes the games on the site)

## Key takeaways

- Once a browser game has loaded, it usually keeps working without internet: none of 28 games stopped in our test.
- 27 of the 28 did not even try to fetch anything while offline.
- A browser game cannot start offline: open it while connected and do not reload the tab.
- Progress saved in the browser, as in all our own games, works without a connection.

**Yes, most browser games keep working without internet once they have loaded: in our test none of 28 games stopped when we cut the internet, and 27 of them did not even try to fetch anything. The catch is that a browser game cannot start offline, so you have to open it while you are still connected and keep the tab open.** We tested it on 28 games on Yes This Game: load the game, cut the network, then keep pressing keys and clicking for 20 seconds while recording every file the game tried to fetch.

## Why a browser game can keep running offline

When you open a browser game, the browser downloads the game's files: the code, the pictures and the sounds. Most games download everything at the start, and from then on the game runs on your own computer or phone. The internet is only needed again if the game fetches something new later, such as the next level, a sound it did not load yet, or an ad.

What does not work offline is **starting** the game. The page itself has to come from the server. If you reload the tab without a connection, the browser shows its offline page instead of the game.

## What happened when we cut the internet

![Bar chart of 28 games during 20 seconds without internet: asked for nothing 27, tried to reach an analytics server 1, stopped or showed an error 0](https://yesthisgame.com/wp-content/uploads/2026/10/browser-games-offline-chart.png)
*28 games on Yes This Game during 20 seconds without internet.*

*28 games without internet*

| Result | Games |
| --- | --- |
| Asked for nothing at all | 27 |
| Tried to reach an analytics server, kept running | 1 |
| Stopped or showed an error | 0 |

None of the games tried to load a missing level, picture or sound during the test. The only requests made without a connection came from [Blue Cars Driver](https://yesthisgame.com/blue-cars-driver/), a game made with the Unity engine, which tried five times to report to Unity's analytics service; the game itself did not need them. Keep in mind that we tested the first part of each game: a large game that loads new worlds later may need the internet again at that point.

## How to play a browser game offline

1. Open the game while you still have internet, on the device you want to play on.
2. Start it and play the first level for a moment, so that everything the game needs at the start has loaded.
3. Do not close or reload the tab. You can switch to other tabs or put the device to sleep; the game is still there when you come back.
4. Play without a connection, for example on a plane or a train.
5. If the game asks for something it cannot load, such as a new world, connect again for a moment.

## Does my progress survive without internet?

Yes, in games that save in your browser. All our own games on Yes This Game keep levels, stars and settings in your browser's local storage, which works without a connection. Retro games keep save states in the browser too. Progress is saved on the device you play on, not in an account, so it stays there when you reconnect.

## On phones and tablets

The same rules apply in a mobile browser, with one extra point: phones close background tabs more quickly to save memory. Before you go offline, keep the game in the tab you are using and avoid opening many other apps, so the phone does not unload it.

## How much data to load before you go

Half of the games we measured downloaded about 3 MB or less, so loading a game before you leave usually costs little mobile data; big 3D games can take 20 to 50 MB. Our article on [how much data browser games use](https://yesthisgame.com/blog/how-much-data-do-browser-games-use/) has the full measurements.

## Frequently asked questions

### Can you play browser games offline?

Yes, once they have loaded. Open the game while you are connected, keep the tab open and you can keep playing without internet. In our test none of 28 games stopped when we cut the connection.

### Why does the game not open without internet?

The page itself has to come from the server. A browser game cannot start or reload without a connection, so open it before you go offline.

### Will I lose my progress offline?

No, in games that save in your browser. All our own games keep levels and stars in local storage, which works offline.

### How much data do I need to load a game before I go?

Half of the games we measured downloaded about 3 MB or less. Big 3D games can take 20 to 50 MB.

### Does it work on a phone?

Yes, but phones close background tabs sooner. Keep the game in the tab you use and avoid opening many other apps.

## Games in this guide

- [Seat Jam 3D](https://yesthisgame.com/seat-jam-3d.md): Play Seat Jam free online: seat every passenger on a seat of their colour. The aisle is narrow, so the order matters. 40 buses, undo and hints. No download.
- [Water Sort Puzzle](https://yesthisgame.com/water-sort-puzzle.md): Play Water Sort Puzzle free online. Pour colored water between the tubes until each one holds a single color. No download, works on phone and PC.
- [Kido Adventure](https://yesthisgame.com/kido-adventure.md): Play Kido Adventure free online: run and jump through 10 platform levels, collect keys and cakes and dodge the monsters. Keyboard or touch, no download.
- [Contra](https://yesthisgame.com/contra.md): Play Contra online free: run, jump and shoot through eight stages of the 1988 NES classic. Cheats button for unlimited lives and the spread gun. No download.