diff --git a/Cargo.lock b/Cargo.lock
index 5abec32..4c106e2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1396,7 +1396,7 @@ checksum = "b97b65636e5b9ef369943878ac74335ba1c55c1cb6adbf1e2c293c624248d693"
 
 [[package]]
 name = "figcraft"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "arboard",
  "eframe",
@@ -1417,7 +1417,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-cli"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "figcraft-doc",
  "figcraft-engine",
@@ -1431,7 +1431,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-collab"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "base64 0.22.1",
  "figcraft-color",
@@ -1446,7 +1446,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-collab-net"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "base64 0.22.1",
  "figcraft-collab",
@@ -1461,7 +1461,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-color"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "kurbo",
  "serde",
@@ -1470,7 +1470,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-doc"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "figcraft-color",
  "figcraft-geom",
@@ -1482,7 +1482,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-engine"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "base64 0.22.1",
  "figcraft-collab",
@@ -1507,7 +1507,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-format"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "figcraft-doc",
  "image",
@@ -1519,7 +1519,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-geom"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "kurbo",
  "serde",
@@ -1527,7 +1527,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-layout"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "figcraft-doc",
  "figcraft-geom",
@@ -1535,7 +1535,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-mcp"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "base64 0.22.1",
  "figcraft-collab-net",
@@ -1551,7 +1551,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-pathops"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "figcraft-doc",
  "figcraft-geom",
@@ -1560,7 +1560,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-pdf"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "figcraft-color",
  "figcraft-doc",
@@ -1577,7 +1577,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-plugin"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "serde",
  "serde_json",
@@ -1588,7 +1588,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-render"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "crc32fast",
  "figcraft-color",
@@ -1604,7 +1604,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-svg"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "base64 0.22.1",
  "figcraft-color",
@@ -1618,7 +1618,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-text"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "figcraft-doc",
  "figcraft-geom",
@@ -1630,7 +1630,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-ui-egui"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "base64 0.22.1",
  "egui",
@@ -1651,7 +1651,7 @@ dependencies = [
 
 [[package]]
 name = "figcraft-web"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "eframe",
  "egui",
@@ -5631,7 +5631,7 @@ checksum = "9440ea3e5aeabb0ac63af70daf835274065238cdd0cec83418f417eae38bacee"
 
 [[package]]
 name = "xtask"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "figcraft-color",
  "figcraft-doc",
diff --git a/Cargo.toml b/Cargo.toml
index 612d626..c4d38d1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ exclude = ["plugins"]
 # default-members = ["crates/*", "apps/figcraft", "apps/figcraft-cli", "xtask"]
 
 [workspace.package]
-version = "0.3.0"
+version = "0.3.1"
 edition = "2024"
 license = "MIT OR Apache-2.0"
 rust-version = "1.95"
@@ -96,3 +96,15 @@ opt-level = 1
 [profile.release]
 lto = "thin"
 codegen-units = 4
+
+# The browser build only (apps/figcraft-web/index.html: data-cargo-profile). Optimised for size:
+# packaging/web/package.sh fails a .wasm over 24 MiB (Cloudflare's per-file cap is 25 MiB).
+# wasm32-unknown-unknown always aborts on panic, so panic = "abort" changes nothing there.
+[profile.web-release]
+inherits = "release"
+opt-level = "s"
+lto = "fat"
+codegen-units = 1
+debug = false
+strip = true
+panic = "abort"
diff --git a/apps/figcraft-web/index.html b/apps/figcraft-web/index.html
index 7c6487f..1a9969d 100644
--- a/apps/figcraft-web/index.html
+++ b/apps/figcraft-web/index.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
   <title>FigCraft</title>
-  <link data-trunk rel="rust" data-bin="figcraft-web" data-wasm-opt="z" data-weak-refs />
+  <link data-trunk rel="rust" data-bin="figcraft-web" data-cargo-profile="web-release" data-wasm-opt="z" data-wasm-opt-params="--enable-bulk-memory --enable-bulk-memory-opt --enable-nontrapping-float-to-int --enable-sign-ext --enable-reference-types --enable-multivalue" data-weak-refs />
   <style>
     html, body { margin: 0; padding: 0; width: 100%; height: 100%; overflow: hidden; background: #f5f5f5; }
     #figcraft_canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
diff --git a/docs/releasing.md b/docs/releasing.md
index 7c33489..ce6bfc7 100644
--- a/docs/releasing.md
+++ b/docs/releasing.md
@@ -150,6 +150,13 @@ tar -xzf figcraft-<v>-freebsd-x86_64.tar.gz --strip-components 1 -C /usr/local
 with sample `_headers`/`.htaccess` and the hosting guide. The app uses WebGPU with a WebGL2
 fallback; `?webgl` forces WebGL2. 0.1.0: wasm 17.7 MiB raw, 6.7 MiB gzip, 4.4 MiB Brotli.
 
+The wasm is built with the size-optimised `web-release` Cargo profile (`opt-level = "s"`, fat
+LTO, one codegen unit; `data-cargo-profile` in `apps/figcraft-web/index.html`) and then
+`wasm-opt -Oz`, which needs the wasm features rustc emits by default passed explicitly
+(`data-wasm-opt-params`). Sizes: 0.2.0 21.1 MiB and 0.3.0 25.8 MiB (failed the gate; the plugin
+interpreter and collaboration code landed) with the desktop `release` profile; 0.3.1 17.2 MiB
+with `web-release`. The desktop builds keep `release`.
+
 ## Secrets
 
 All signing secrets are **`release`-environment secrets** (deployment branches: `release` only),