iconify_full

Use Iconify icons in Flutter as themed SVGs, with a local offline cache of 200+ open icon sets and automatic subsetting so release builds only include icons you reference.

Icon licenses: This package is MIT. Icon artwork has per-set licenses — see LICENSE-ICONS.md. You are responsible for compliance in your app.

Features

  • 200+ icon sets, 200k+ icons — same catalogs as icon-sets.iconify.design
  • Offline cache — download once per machine or CI
  • Themed SVG — IconifyTheme + tinting for monochrome sets
  • Debug cache — iterate on new icons without re-running subset on every flutter run
  • Typed icons — generated Iconifies.* (subset) or Mdi.* / Solar.* (full catalog via iconify_codegen)
  • Tree-shaking — subset copies only icons you reference in lib/
  • Auto subset on build — Android & iOS via plugin; Windows/Linux via CMake; web via iconify_build

Step-by-step: new Flutter app

Step 1 — Add the dependency

In your app pubspec.yaml:

dependencies:
  flutter:
    sdk: flutter
  iconify_full: ^0.1.6

Then:

flutter pub get

Step 2 — Create the manifest (first time only)

Before iconify_manifest.g.dart exists, your app cannot import it. Bootstrap an empty starter file:

cd your_app   # folder with pubspec.yaml
dart run iconify_full:iconify_init

This creates:

  • lib/generated/iconify_manifest.g.dart — empty map, compiles immediately
  • assets/iconify/ — placeholder folder
  • flutter: assets: entry in pubspec.yaml (if missing)

Use --force to replace an existing manifest with a fresh starter.

Step 3 — Register the manifest in main.dart

import 'package:iconify_full/iconify_full.dart';
import 'generated/iconify_manifest.g.dart' as iconify_manifest;

void main() {
  setupIconifyFull(
    manifest: iconify_manifest.iconifyAssetFor,
    // Debug only — skip re-subset while iterating (see below)
    debugCachePath: '.iconify_cache',
  );
  runApp(const MyApp());
}

Debug vs release

Mode What you do when adding a new icon
Debug (flutter run) Download the set once, point debugCachePath at .iconify_cache, use IconifyIcon('prefix:name') — no subset needed while iterating
Release (flutter build …) Subset runs automatically on Android/iOS/desktop (or run iconify_subset / iconify_build for web) — only referenced icons ship

In release builds, registerIconifyDebugCache is ignored; icons must be in the generated manifest.

Step 4 — Download the icon cache (once per machine)

From your app project root (where your app pubspec.yaml lives), or from a monorepo root:

# Default cache folder: .iconify_cache next to the app
dart run iconify_full:iconify_download

# Or choose a path (e.g. shared repo cache)
dart run iconify_full:iconify_download --cache /path/to/.iconify_cache

# Only specific sets (faster)
dart run iconify_full:iconify_download -p mdi -p tabler -p solar

This downloads JSON from iconify/icon-sets and writes SVGs into the cache. Full download is large (~500MB+) and can take 20–60 minutes.

Add .iconify_cache/ to .gitignore (recommended). Cache CI separately — see CI/CD below.

Step 5 — Configure iconify_full (optional)

In your app pubspec.yaml:

iconify_full:
  cache: .iconify_cache          # default
  assets_dir: assets/iconify     # default
  manifest: lib/generated/iconify_manifest.g.dart
  auto_subset: true              # default

For a monorepo with cache next to the iconify_full package (e.g. brewlab + iconify_full siblings):

iconify_full:
  cache: ../iconify_full/.iconify_cache

For cache in the app folder:

iconify_full:
  cache: .iconify_cache

Only cache is required when it is not .iconify_cache in the app root. Other keys match defaults and can be omitted:

iconify_full:
  cache: ../iconify_full/.iconify_cache

Step 6 — Use icons in widgets

import 'package:iconify_full/iconify_full.dart';
import 'generated/iconify_icons.g.dart'; // after first subset

IconifyTheme(
  data: IconifyThemeData(
    color: Theme.of(context).colorScheme.primary,
    size: 28,
  ),
  child: Row(
    children: [
      IconifyIcon('mdi:home'),
      IconifyIcon.named(Iconifies.mdi_heart), // typed, autocomplete-friendly
      IconifyIcon('tabler:settings', size: 32),
    ],
  ),
)

Icon ids use the form prefix:name (same as Iconify), e.g. mdi:home, solar:star-bold.

Two typed options

Source When Usage
iconify_icons.g.dart (subset) Small — only icons you use IconifyIcon.named(Iconifies.mdi_home)
iconify_catalog/ (codegen) Full set(s) from your cache IconifyIcon.named(Mdi.home)

The first time you add a brand-new icon with subset-only typing, use the string form once, run subset, then switch to Iconifies.*.

Full catalog typing (all icons in cache)

You cannot ship ~200k icons inside the iconify_full pub package (size, analyzer, pub.dev). Generate them in your app after download:

dart run iconify_full:iconify_download -p mdi -p solar   # or full cache
dart run iconify_full:iconify_codegen -P mdi -P solar    # one Dart file per set

This writes lib/generated/iconify_catalog/mdi.dart, solar.dart, and a barrel iconify_catalog.dart:

import 'generated/iconify_catalog/iconify_catalog.dart';

const IconifyIcon.named(Mdi.home);
const IconifyIcon.named(Solar.star_bold);

Add lib/generated/iconify_catalog/ to .gitignore if you generate many sets (can be 10MB+ of Dart). Regenerate when you update the cache.

Step 7 — Subset icons (fills the manifest & assets)

Automatic (recommended):

Platform What happens
Android iconify_subset runs before preBuild (plugin)
iOS Run Script phase before compile (plugin)
Windows / Linux Run Step 7 once, then subset runs via CMake on build
Web Use iconify_build — see below

Manual (any platform):

dart run iconify_full:iconify_subset

This:

  1. Scans lib/**/*.dart for IconifyIcon('…') and Iconifies.* references
  2. Copies matching SVGs to assets/iconify/
  3. Writes lib/generated/iconify_manifest.g.dart and iconify_icons.g.dart
  4. Adds assets/iconify/ to pubspec.yaml if missing

After you add IconifyIcon('prefix:name') in lib/, subset replaces the starter manifest with real entries and copies SVGs into assets/iconify/. This also runs automatically on native builds (see table below).

Step 8 — Desktop hooks (Windows & Linux, one-time per app)

dart run iconify_full:iconify_apply_hooks --project .

This patches CMake so flutter build windows / linux subsets automatically.

Step 9 — Web builds

Gradle/CMake hooks do not run for web. Use:

dart run iconify_full:iconify_build -- build web
# or: dart run iconify_full:iconify_build -- run -d chrome

This runs subset, then forwards to flutter.

Step 10 — Run or release

flutter run
flutter build apk
flutter build appbundle
flutter build ios
flutter build windows

Only icons referenced in code are in the final asset bundle.

CI/CD

Example GitHub Actions pattern:

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: subosito/flutter-action@v2
      - name: Restore icon cache
        uses: actions/cache@v4
        with:
          path: .iconify_cache
          key: iconify-cache-${{ hashFiles('pubspec.lock') }}
      - name: Download icons if cache miss
        run: dart run iconify_full:iconify_download
      - name: Build
        run: flutter build apk

Subset runs during the native build (Android/iOS) or run dart run iconify_full:iconify_subset before flutter build web.

CLI reference

Command Purpose
dart run iconify_full:iconify_init First-time: create empty iconify_manifest.g.dart
dart run iconify_full:iconify_download Download all (or -p prefix) sets to cache
dart run iconify_full:iconify_codegen Generate typed Mdi / Solar classes from cache
dart run iconify_full:iconify_subset Subset used icons into app assets
dart run iconify_full:iconify_apply_hooks Patch Windows/Linux CMake (once per app)
dart run iconify_full:iconify_build -- … Subset + flutter … (good for web)

Download flags: --cache PATH, -p mdi, --force (re-download).

Subset flags: --project PATH, --cache PATH, --no-pubspec.

API overview

Type Role
IconifyIcon('mdi:home') Widget — manifest assets (release) or cache (debug)
IconifyIcon.named(Iconifies.mdi_home) Widget with generated typed ref
IconifyTheme / IconifyThemeData Default color, size, fit
setupIconifyFull(...) Manifest + optional debugCachePath
Iconifies / Mdi / Solar (generated) Typed IconifyIconRef constants
IconifyIconRef Manual typed ref (prefix + name)

Troubleshooting

Solar (or other) icons show blank / nothing

  • Often a stale cache from before 0.1.4 mask export fix. Re-download the set and subset: 
    dart run iconify_full:iconify_download -p solar --force
dart run iconify_full:iconify_subset
  • Confirm assets/iconify/solar/your-icon.svg contains fill="#fff" inside <mask>, not only fill="currentColor".

generated/iconify_manifest.g.dart does not exist

  • Run dart run iconify_full:iconify_init once, then add the import in main.dart.

Red broken-image placeholder

  • Icon not in manifest → run subset after adding IconifyIcon('prefix:name').
  • Icon missing from cache → run iconify_download for that prefix.

Subset finds 0 icons

  • Use string form: IconifyIcon('mdi:home') in lib/ (scanned statically).

Android build: subset failed

  • Ensure iconify_full is in dependencies (not only dev_dependencies).
  • Run dart run iconify_full:iconify_subset manually to see errors.

Android: JVM target mismatch (Kotlin 21 vs Java 17)

  • Update to iconify_full 0.1.6+ (Android plugin is Java-only; no Kotlin in this package).

CMake: iconify_subset does not exist

  • Old iconify_apply_hooks only patched runner/CMakeLists.txt with add_dependencies but not the target.
  • Re-run: dart run iconify_full:iconify_apply_hooks --project .
  • Or replace the # >>> iconify_full block in windows/runner/CMakeLists.txt (see package README / example app).

Cache not found

  • Set iconify_full.cache in pubspec or pass --cache to subset/download.

Licensing

Component License
iconify_full (this package) MIT
Icon artwork Per icon set — LICENSE-ICONS.md

Publishing note (maintainers)

Update homepage, repository, and issue_tracker in pubspec.yaml to your real GitHub URLs before dart pub publish.

Libraries

iconify_full
Offline Iconify icons for Flutter with themed SVGs and build-time subsetting.