diff --git a/library/Rattletrap/Main.hs b/library/Rattletrap/Main.hs
--- a/library/Rattletrap/Main.hs
+++ b/library/Rattletrap/Main.hs
@@ -5,6 +5,8 @@
 
 import qualified Data.ByteString.Lazy as ByteString
 import qualified Data.Version as Version
+import qualified Network.HTTP.Client as Client
+import qualified Network.HTTP.Client.TLS as Client
 import qualified System.Environment as Environment
 
 -- | Gets command-line arguments and passes them to 'mainWithArgs'.
@@ -51,6 +53,14 @@
 getIO files =
   case files of
     [] -> pure (ByteString.getContents, ByteString.putStr)
-    [i] -> pure (ByteString.readFile i, ByteString.putStr)
-    [i, o] -> pure (ByteString.readFile i, ByteString.writeFile o)
+    [i] -> pure (readUrlOrFile i, ByteString.putStr)
+    [i, o] -> pure (readUrlOrFile i, ByteString.writeFile o)
     _ -> fail ("unknown files: " ++ show files)
+
+readUrlOrFile :: FilePath -> IO ByteString.ByteString
+readUrlOrFile i = case Client.parseUrlThrow i of
+  Just request -> do
+    manager <- Client.newTlsManager
+    response <- Client.httpLbs request manager
+    pure (Client.responseBody response)
+  Nothing -> ByteString.readFile i
diff --git a/package.yaml b/package.yaml
--- a/package.yaml
+++ b/package.yaml
@@ -1,5 +1,5 @@
 name: rattletrap
-version: 3.0.0
+version: 3.1.0
 
 category: Game
 description: Rattletrap parses and generates Rocket League replays.
@@ -24,6 +24,8 @@
   - bytestring >= 0.10.8 && < 0.11
   - containers >= 0.5.7 && < 0.6
   - data-binary-ieee754 >= 0.4.4 && < 0.5
+  - http-client >= 0.5.7 && < 0.6
+  - http-client-tls >= 0.3.5 && < 0.4
   - template-haskell >= 2.11.0 && < 2.13
   - text >= 1.2.2 && < 1.3
   - vector >= 0.11.0 && < 0.13
diff --git a/rattletrap.cabal b/rattletrap.cabal
--- a/rattletrap.cabal
+++ b/rattletrap.cabal
@@ -3,7 +3,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           rattletrap
-version:        3.0.0
+version:        3.1.0
 synopsis:       Parse and generate Rocket League replays.
 description:    Rattletrap parses and generates Rocket League replays.
 category:       Game
@@ -99,6 +99,8 @@
     , bytestring >= 0.10.8 && < 0.11
     , containers >= 0.5.7 && < 0.6
     , data-binary-ieee754 >= 0.4.4 && < 0.5
+    , http-client >= 0.5.7 && < 0.6
+    , http-client-tls >= 0.3.5 && < 0.4
     , template-haskell >= 2.11.0 && < 2.13
     , text >= 1.2.2 && < 1.3
     , vector >= 0.11.0 && < 0.13
@@ -199,6 +201,8 @@
     , bytestring >= 0.10.8 && < 0.11
     , containers >= 0.5.7 && < 0.6
     , data-binary-ieee754 >= 0.4.4 && < 0.5
+    , http-client >= 0.5.7 && < 0.6
+    , http-client-tls >= 0.3.5 && < 0.4
     , template-haskell >= 2.11.0 && < 2.13
     , text >= 1.2.2 && < 1.3
     , vector >= 0.11.0 && < 0.13
@@ -220,6 +224,8 @@
     , bytestring >= 0.10.8 && < 0.11
     , containers >= 0.5.7 && < 0.6
     , data-binary-ieee754 >= 0.4.4 && < 0.5
+    , http-client >= 0.5.7 && < 0.6
+    , http-client-tls >= 0.3.5 && < 0.4
     , template-haskell >= 2.11.0 && < 2.13
     , text >= 1.2.2 && < 1.3
     , vector >= 0.11.0 && < 0.13