A Curated List of Awesome WebAssembly Applications

Welcome PR if you find some Awsome WebAssembly Applications 🤣

• Collage Studio - Free photo collage generator that uses WebAssembly to run a genetic algorithm, rapidly evolving thousands of layout variations to create seamless, gap-free collages without cropping your images.

• Darkly — An open-source, WebGPU-powered photo editor and paint program for digital artists, written in Rust + WebAssembly.

• LogiSheets — An open-source, canvas-powered online spreadsheet application.

• Remove Audio — Strip audio from video files in the browser using WebAssembly and FFmpeg.wasm. No uploads, no account. Batch up to 20 files.

• SlingSite — Browser-based image and video compressor using FFmpeg.wasm: converts images to JPG/WebP/AVIF and video to VP9/HEVC/H.264, resized per device. No uploads. Free unlimited use.

• IconKing — Free browser-based Lottie animation tool. Preview .json/.lottie files, edit colors across all layers, and convert between Lottie JSON ↔ dotLottie formats. 100% client-side via WebAssembly — files never leave the browser.

• Tonalux — Browser-based audio production platform featuring a WebAssembly-powered media converter (FFmpeg.wasm), spectrum analyzer and plugin comparer. All processing happens locally in the browser.

• FreeBookConvert — An open-source set of in-browser converters for EPUB, PDF, HEIC and images, plus audiobook tools: MP3 ⇄ M4B with chapters via FFmpeg.wasm and ebook-to-audiobook narration with Kokoro-82M. Files never leave the browser.

• [Photoshop] Photoshop's journey to the web

• [Figma] WebAssembly cut Figma's load time by 3x

• [Photon] Photon - Image Processing in WebAssembly

• [Squoosh] Replacing a hot path in your app's JavaScript with WebAssembly

• [SammaPix] 51 browser-based image, PDF and video tools using WASM: libarchive (RAR/7z/tar.gz), libraw (CR2/NEF/ARW/DNG), JPEG XL encoding, and RMBG-1.4 background removal via ONNX Runtime Web

• [IDPhotoSnap] Browser-only passport and visa photo maker using WebAssembly. Background segmentation via BRIA RMBG-1.4 (ONNX), face landmark detection via face-api.js, geometric cropping via Canvas API. 100 countries, 248 document formats validated against 15+ official government sources (US State Dept, UK HMPO, Bundesdruckerei, Indian PSK, Chinese MFA COVA, etc.). Photo never leaves the device, verifiable in DevTools Network tab. Companion open dataset at github.com/whitetirocket/passport-photo-specs.

• [Discourse] Faster (and smaller) uploads in Discourse with Rust, WebAssembly and MozJPEG

• [Zoom] Zoom on Web: WebAssembly SIMD, WebTransport, and WebCodecs

• [Agora] 如何通过 WebAssembly 在 Web 进行实时视频人像分割

• [Google Meet] Background Features in Google Meet, Powered by Web ML

• [FFmpeg.wasm] In-browser transcoding of video files with FFmpeg and WebAssembly

• [BBC iPlayer] Building a WebAssembly Runtime for BBC iPlayer

• [WXInlinePlayer] WXInlinePlayer：高性能 WASM 播放器实现

• [ogv.js] JavaScript media player using Ogg/Vorbis/Theora/Opus/WebM libs compiled with Emscripten

• [Clipchamp] Clipchamp's video editor PWA installs see a 97% monthly growth

• [Picovoice] Offline Voice AI in a Web Browser

• [Mastershot] Mastershot is a web-based video editor, based on the WebAssembly version of FFmpeg

• [淘宝直播] 从 Chrome 源码 video 实现到 Web H265 Player

• [淘宝直播] Web端H.265播放器研发解密

• [爱奇艺直播] 爱奇艺直播 WebAssembly 优化之路

• [花椒直播] 花椒前端基于WebAssembly 的 H.265 播放器研发

• [NOW 直播] 基于 WebAssembly的 H.265 播放器

• [腾讯 IMWeb] 使用 FFmpeg 与 WebAssembly 实现纯前端视频截帧

• [腾讯 IMWeb] 看前端如何通过 WebAssembly 实现播放器预览能力

• [Convert.rocks] Free browser-based file converter — HEIC to JPG, WebP to PNG and more. Uses libheif compiled to WebAssembly via heic-to; all conversions run client-side, no server uploads.

• [Google Earth] Chromium Blog: WebAssembly brings Google Earth to more ...

• [Webamp] Speeding Up Webamp’s Music Visualizer with WebAssembly

• [Webcola] Speeding Up the Webcola Graph Viz Library with Rust + WebAssembly

• [SciCharts] SciCharts Audio Analyzer Demo

• [Project Glitter] Project Glitter - Music Visualisation

• [Perspective] Streaming pivot visualization via WebAssembly

• [Room Modes Simulator] FEM acoustic solver running in-browser using WebAssembly.

• [Grenzwert] In-browser 3D CT/MRI (DICOM) volume viewer with cinematic rendering, via WebAssembly + WebGPU.

• [Caso Abierto] A noir detective game where you solve cases by writing SQL, running DuckDB-WASM in the browser against Parquet case files

• [wine-assembly] Run unmodified Win32/Win98 PE executables — Pinball Space Cadet, SkiFree, FreeCell, Solitaire, Minesweeper, Winamp, mspaint — directly in the browser. The interpreter is coded directly in WebAssembly Text (no Rust/C compiler); guest binaries run as-is, no recompilation.

• [GLAS] GLAS = WebGL + Assembly Script(WASM);

• [白鹭引擎] WebAssembly 在白鹭引擎5.0中的实践

• [Unreal Engine 4] Setting up UE4 for HTML5 development

• [Defold] A 2D gaming engine for writing web-based games

• [BananaBread] BananaBread is a C++ 3D game engine that runs on the web using JavaScript+WebGL+HTML

• [Pont] Pont - a multiplayer board game in Rust and WebAssembly

• [Citybound] A work-in-progress, open-source, multi-player city simulation game

• [AutoCAD] AutoCAD & WebAssembly: Moving a 30 Year Code Base to the Web

• [StackBlitz] Introducing WebContainers: Run Node.js natively in your browser

• [vim.wasm] Vim editor ported to WebAssembly

• [Jupyter] JupyterLite: Jupyter ❤️ WebAssembly ❤️ Python

• [Pyodide] Pyodide: Bringing the scientific Python stack to the browser

• [PDFGem] Free browser-based PDF tools — merge, split, compress, OCR, sign, convert, redact, watermark. All processing via WebAssembly; files never leave the browser.

• [Vizua] Free browser-based image tools — compress, resize, convert (WebP, AVIF, PNG, JPEG), remove background, upscale, OCR. 91 tools, all powered by WebAssembly; no server uploads.

• [Image Machine] Free browser-based image tools — convert (AVIF, WebP, JPEG XL, HEIC, PSD, RAW), compress to a target file size, resize, remove background, upscale, OCR, EXIF inspection and removal, GIF editing. 160+ tools in 24 languages, powered by WebAssembly (jSquash, ONNX Runtime Web, Tesseract.js); no server uploads.

• [PDF Mavericks] 40+ free browser-based PDF tools — compress, merge, split, sign, watermark, redact, OCR, convert. All processing via WebAssembly (pdf-lib + PDF.js); files never leave the device.

• [Slay PDF] Free local PDF editor for splitting, merging, signing, resizing, posterising and editing PDFs. Runs in-browser with WebAssembly-powered PDF workflows; files stay on the device.

• [PDFree] 30+ free browser-based PDF tools — merge, split, compress, OCR, sign, redact, protect, and convert to/from Word/Excel/PowerPoint/Markdown. Client-side via pdf-lib/pdf.js WebAssembly; files never leave the browser. Open source (AGPLv3), 14 languages.

• ConvertiZen - Privacy-friendly document converter (PDF, Word, Excel, images) running entirely in the browser via WebAssembly. No file uploads, no server processing.

• hushvert - Privacy-first file converter (images incl. HEIC/JPEG XL, PDF page operations, archives, audio, small video) running entirely in the browser via WebAssembly. No file uploads, no server processing.

• gottrix - Client-side file conversion suite (500+ tools: PDF, image, audio, video, data formats) built on WebAssembly. No uploads, works offline after first visit, 25+ languages.

• ArtboardLab - Browser-based design tools: image compression and format conversion (MozJPEG, OxiPNG, WebP, AVIF compiled to WebAssembly), plus an Adobe Illustrator .ai viewer and .ai to SVG/PNG/PDF converters built on pdf.js. Everything runs client-side, so files are never uploaded and no account is needed.

• A Box of Tools - 35 single-purpose file tools for images, video, audio, PDFs and text, in 15 languages. HEIC and HEIF decoding runs libheif compiled to WebAssembly; the rest is WebCodecs, Canvas and hand-written parsers. Open source (MIT), nothing is uploaded, and every tool installs as a PWA that works offline.

• Pixeltools - Free suite of browser-based tools for images, video, audio and PDF: compress, convert, resize, merge, remove background, OCR and more. Video and audio run on ffmpeg.wasm; everything is client-side WebAssembly, no uploads, no account.

• DBConvert Data Viewers - Free browser-based viewers for Parquet, JSONL/NDJSON and SQLite files. DuckDB-WASM runs the Parquet and JSONL queries and the official sqlite-wasm build reads the databases, all inside the tab: the file is opened through a browser file handle and never uploaded. Read-only (SELECT), no install, no account.

• ConvertSTL - Free browser-based 3D file converter, viewer and STL toolkit. STEP and IGES are tessellated by OpenCascade compiled to WebAssembly, alongside mesh formats (STL, OBJ, 3MF, PLY, GLB, glTF, FBX, DAE) and vector input (SVG, DXF); there are per-format viewers and STL repair, scale and simplify tools. Nothing is uploaded and no account is needed.

• BrainCoder - 123+ free privacy-first browser tools — PDF compress/merge/split/redact/protect, images, JSON/SQL/XML formatters, regex, hashes, generators, converters — on a Rust/WASM (zpdf) PDF core, MIT open source; files never leave the device (proof page at /verify).

• Vellum - Free browser-based PDF tools — merge, split, compress, OCR, sign, redact, convert to Word, Excel or Markdown — running entirely client-side: qpdf is compiled to WebAssembly for encryption, pdf.js and pdf-lib do the rest. Nothing is uploaded, no account, no watermark, and the site installs as an offline PWA. The engine is MIT open source and also ships as a command-line tool; four languages.

• FileOnTap HEIC to PNG - Free browser-based HEIC to PNG converter, files never uploaded.

• [TensorFlow.js] Supercharging the TensorFlow.js WebAssembly backend with SIMD and multi-threading

• [ONNX.js] ONNX.js machine learning with WebAssembly

• [LocalMode] Local-first browser AI toolkit running LLMs, Whisper speech-to-text, Kokoro text-to-speech, CLIP and vision models via WebAssembly and WebGPU, entirely on-device

• [Remove Audio: Background Noise Remover] Removes background noise from video and audio in the browser with the DeepFilterNet3 model running on WebAssembly; the file stays on the device, no account

• [absurd-sql] A future for SQL on the web

• [飞书] 飞书 WASM 实践——SQLite 篇

• [twr-wasm] Easy library for integrating C/C++ into browser apps

• [Yew] Rust / Wasm framework for building client web apps

• [Blazor] Build client web apps with C#

• [Tokamak] SwiftUI-compatible framework for building browser apps with WebAssembly and native apps for other platforms

• [KubeStellar Console] AI-powered multi-cluster Kubernetes dashboard using SQLite WASM for persistent client-side caching

• [kalker] Kallker is a feature-rich scientific calculator that runs in the browser

• [NoteCalc] NoteCalc is a handy notepad with a smart builtin calculator

• [Yutovo] Yutovo is a visual scientific calculator inside a text editor

• [Vedaksha Playground] Private, client-side Vedic astrology chart calculator powered by a zero-data Rust/WebAssembly ephemeris; all computation stays in the browser

• [JSVMP] 基于 WebAssembly 的 JavaScript 代码虚拟化保护方法研究与实现

• [Fermyon] Introducing Spin

• [Wasm Workers Server] Run your workers anywhere with WebAssembly

• [Cloudflare] WebAssembly on Cloudflare Workers

• [Fastly] Announcing Lucet: Fastly’s native WebAssembly compiler and runtime

• [Atmo] Building for a future based on WebAssembly

• [Krustlet] Introducing Krustlet, the WebAssembly Kubelet

• [WasmEdge] 初探 WebAssembly 在 serverless 中的应用

• [Kubernetes] WebAssembly 与 Kubernetes 双剑合璧

• [Vino] Vino - Code less, build more

• [Easegress] How to do an online flash sale event with Easegress and WebAssembly

• [MOSN] WebAssembly 在 MOSN 中的实践 - 基础框架篇

• [Cosmonic] Cosmonic - Imagine. Create. Scale.

• [天猫精灵] 基于 WebAssembly 的 AIoT 应用框架实践

• [Ethereum] Ethereum WebAssembly Docs

• [NEAR] A blockchain that runs smart contracts on a WebAssembly Virtual Machine

• [Spacemesh] Spacemesh WebAssembly VM

• [Zellij] Zellij - A terminal workspace, with wasm plugin system