diff --git a/codecs/basis/dec/basis_dec.d.ts b/codecs/basis/dec/basis_dec.d.ts
new file mode 100644
index 00000000..55c47c90
--- /dev/null
+++ b/codecs/basis/dec/basis_dec.d.ts
@@ -0,0 +1,7 @@
+export interface BasisModule extends EmscriptenWasm.Module {
+  decode(data: BufferSource): ImageData | null;
+}
+
+declare var moduleFactory: EmscriptenWasm.ModuleFactory<BasisModule>;
+
+export default moduleFactory;
diff --git a/codecs/basis/dec/basis_dec.wasm b/codecs/basis/dec/basis_dec.wasm
index 93e2a2ec..4adaee3f 100755
Binary files a/codecs/basis/dec/basis_dec.wasm and b/codecs/basis/dec/basis_dec.wasm differ
diff --git a/codecs/basis/enc/basis_enc.cpp b/codecs/basis/enc/basis_enc.cpp
index 8abd6c6f..6b9956c5 100644
--- a/codecs/basis/enc/basis_enc.cpp
+++ b/codecs/basis/enc/basis_enc.cpp
@@ -7,9 +7,11 @@
 using namespace emscripten;
 using namespace basisu;
 
+struct BasisOptions {};
+
 thread_local const val Uint8Array = val::global("Uint8Array");
 
-val encode(std::string image_in, int image_width, int image_height /*, MozJpegOptions opts*/) {
+val encode(std::string image_in, int image_width, int image_height, BasisOptions opts) {
   basisu_encoder_init();
 
   basis_compressor_params params;
@@ -42,23 +44,8 @@ val encode(std::string image_in, int image_width, int image_height /*, MozJpegOp
 }
 
 EMSCRIPTEN_BINDINGS(my_module) {
-  // value_object<MozJpegOptions>("MozJpegOptions")
-  //     .field("quality", &MozJpegOptions::quality)
-  //     .field("baseline", &MozJpegOptions::baseline)
-  //     .field("arithmetic", &MozJpegOptions::arithmetic)
-  //     .field("progressive", &MozJpegOptions::progressive)
-  //     .field("optimize_coding", &MozJpegOptions::optimize_coding)
-  //     .field("smoothing", &MozJpegOptions::smoothing)
-  //     .field("color_space", &MozJpegOptions::color_space)
-  //     .field("quant_table", &MozJpegOptions::quant_table)
-  //     .field("trellis_multipass", &MozJpegOptions::trellis_multipass)
-  //     .field("trellis_opt_zero", &MozJpegOptions::trellis_opt_zero)
-  //     .field("trellis_opt_table", &MozJpegOptions::trellis_opt_table)
-  //     .field("trellis_loops", &MozJpegOptions::trellis_loops)
-  //     .field("chroma_subsample", &MozJpegOptions::chroma_subsample)
-  //     .field("auto_subsample", &MozJpegOptions::auto_subsample)
-  //     .field("separate_chroma_quality", &MozJpegOptions::separate_chroma_quality)
-  //     .field("chroma_quality", &MozJpegOptions::chroma_quality);
+  value_object<BasisOptions>("BasisOptions");
+  // .field("quality", &MozJpegOptions::quality);
 
   function("encode", &encode);
 }
diff --git a/codecs/basis/enc/basis_enc.d.ts b/codecs/basis/enc/basis_enc.d.ts
new file mode 100644
index 00000000..cdcc8f3b
--- /dev/null
+++ b/codecs/basis/enc/basis_enc.d.ts
@@ -0,0 +1,15 @@
+export interface EncodeOptions {
+}
+
+export interface BasisModule extends EmscriptenWasm.Module {
+  encode(
+    data: BufferSource,
+    width: number,
+    height: number,
+    options: EncodeOptions,
+  ): Uint8Array | null;
+}
+
+declare var moduleFactory: EmscriptenWasm.ModuleFactory<BasisModule>;
+
+export default moduleFactory;
diff --git a/codecs/basis/enc/basis_enc.js b/codecs/basis/enc/basis_enc.js
index 8dad893d..e95036c0 100644
--- a/codecs/basis/enc/basis_enc.js
+++ b/codecs/basis/enc/basis_enc.js
@@ -7,81 +7,55 @@ function(Module) {
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+q&&S("argTypes array size mismatch! Must at least get return value and 'this' types!");for(var y=null!==h[1]&&!1,z=!1,p=1;p<h.length;++p)if(null!==h[p]&&void 0===h[p].ca){z=!0;break}var ia="void"!==h[0].name,A="",H="";for(p=0;p<q-2;++p)A+=(0!==p?", ":"")+"arg"+p,H+=(0!==p?", ":"")+"arg"+p+"Wired";m="return function "+Pa(m)+"("+A+") {\nif (arguments.length !== "+(q-2)+") {\nthrowBindingError('function "+m+" called with ' + arguments.length + ' arguments, expected "+(q-2)+" args!');\n}\n";z&&(m+="var destructors = [];\n");
+var Y=z?"destructors":"null";A="throwBindingError invoker fn runDestructors retType classParam".split(" ");n=[S,n,g,Ma,h[0],h[1]];y&&(m+="var thisWired = classParam.toWireType("+Y+", this);\n");for(p=0;p<q-2;++p)m+="var arg"+p+"Wired = argType"+p+".toWireType("+Y+", arg"+p+"); // "+h[p+2].name+"\n",A.push("argType"+p),n.push(h[p+2]);y&&(H="thisWired"+(0<H.length?", ":"")+H);m+=(ia?"var rv = ":"")+"invoker(fn"+(0<H.length?", ":"")+H+");\n";if(z)m+="runDestructors(destructors);\n";else for(p=y?1:2;p<
+h.length;++p)q=1===p?"thisWired":"arg"+(p-2)+"Wired",null!==h[p].ca&&(m+=q+"_dtor("+q+"); // "+h[p].name+"\n",A.push(q+"_dtor"),n.push(h[p].ca));ia&&(m+="var ret = retType.fromWireType(rv);\nreturn ret;\n");A.push(m+"}\n");h=ab(A).apply(null,n);p=b-1;if(!f.hasOwnProperty(l))throw new Sa("Replacing nonexistant public symbol");void 0!==f[l].ba&&void 0!==p?f[l].ba[p]=h:(f[l]=h,f[l].ha=p);return[]})},k:function(a,b,c,d,e){function g(m){return m}b=R(b);-1===e&&(e=4294967295);var k=Ua(c);if(0===d){var h=
+32-8*c;g=function(m){return m<<h>>>h}}var l=-1!=b.indexOf("unsigned");Q(a,{name:b,fromWireType:g,toWireType:function(m,n){if("number"!==typeof n&&"boolean"!==typeof n)throw new TypeError('Cannot convert "'+Za(n)+'" to '+this.name);if(n<d||n>e)throw new TypeError('Passing a number "'+Za(n)+'" from JS side to C/C++ side to an argument of type "'+b+'", which is outside the valid range ['+d+", "+e+"]!");return l?n>>>0:n|0},argPackAdvance:8,readValueFromPointer:kb(b,k,0!==d),ca:null})},j:function(a,b,
+c){function d(g){g>>=2;var k=J;return new e(G,k[g+1],k[g])}var e=[Int8Array,Uint8Array,Int16Array,Uint16Array,Int32Array,Uint32Array,Float32Array,Float64Array][b];c=R(c);Q(a,{name:c,fromWireType:d,argPackAdvance:8,readValueFromPointer:d},{ka:!0})},w:function(a,b){b=R(b);var c="std::string"===b;Q(a,{name:b,fromWireType:function(d){var e=J[d>>2];if(c)for(var g=d+4,k=0;k<=e;++k){var h=d+4+k;if(k==e||0==D[h]){g=C(g,h-g);if(void 0===l)var l=g;else l+=String.fromCharCode(0),l+=g;g=h+1}}else{l=Array(e);
+for(k=0;k<e;++k)l[k]=String.fromCharCode(D[d+4+k]);l=l.join("")}V(d);return l},toWireType:function(d,e){e instanceof ArrayBuffer&&(e=new Uint8Array(e));var g="string"===typeof e;g||e instanceof Uint8Array||e instanceof Uint8ClampedArray||e instanceof Int8Array||S("Cannot pass non-string to std::string");var k=(c&&g?function(){for(var m=0,n=0;n<e.length;++n){var q=e.charCodeAt(n);55296<=q&&57343>=q&&(q=65536+((q&1023)<<10)|e.charCodeAt(++n)&1023);127>=q?++m:m=2047>=q?m+2:65535>=q?m+3:m+4}return m}:
+function(){return e.length})(),h=sb(4+k+1);J[h>>2]=k;if(c&&g)ja(e,h+4,k+1);else if(g)for(g=0;g<k;++g){var l=e.charCodeAt(g);255<l&&(V(h),S("String has UTF-16 code units that do not fit in 8 bits"));D[h+4+g]=l}else for(g=0;g<k;++g)D[h+4+g]=e[g];null!==d&&d.push(V,h);return h},argPackAdvance:8,readValueFromPointer:Na,ca:function(d){V(d)}})},p:function(a,b,c){c=R(c);if(2===b){var d=la;var e=na;var g=oa;var k=function(){return ma};var h=1}else 4===b&&(d=pa,e=qa,g=ra,k=function(){return J},h=2);Q(a,{name:c,
+fromWireType:function(l){for(var m=J[l>>2],n=k(),q,y=l+4,z=0;z<=m;++z){var p=l+4+z*b;if(z==m||0==n[p>>h])y=d(y,p-y),void 0===q?q=y:(q+=String.fromCharCode(0),q+=y),y=p+b}V(l);return q},toWireType:function(l,m){"string"!==typeof m&&S("Cannot pass non-string to C++ string type "+c);var n=g(m),q=sb(4+n+b);J[q>>2]=n>>h;e(m,q+4,n+b);null!==l&&l.push(V,q);return q},argPackAdvance:8,readValueFromPointer:Na,ca:function(l){V(l)}})},Q:function(a,b,c,d,e,g){La[a]={name:R(b),ma:fb(c,d),na:fb(e,g),ia:[]}},M:function(a,
+b){b=R(b);Q(a,{za:!0,name:b,argPackAdvance:0,fromWireType:function(){},toWireType:function(){}})},n:Ya,z:function(a){if(0===a)return U(mb());var b=lb[a];a=void 0===b?R(a):b;return U(mb()[a])},N:function(a){4<a&&(T[a].fa+=1)},x:function(a,b,c,d){a||S("Cannot use deleted val. handle = "+a);a=T[a].value;var e=ob[b];if(!e){e="";for(var g=0;g<b;++g)e+=(0!==g?", ":"")+"arg"+g;var k="return function emval_allocator_"+b+"(constructor, argTypes, args) {\n";for(g=0;g<b;++g)k+="var argType"+g+" = requireRegisteredType(Module['HEAP32'][(argTypes >>> 2) + "+
+g+'], "parameter '+g+'");\nvar arg'+g+" = argType"+g+".readValueFromPointer(args);\nargs += argType"+g+"['argPackAdvance'];\n";e=(new Function("requireRegisteredType","Module","__emval_register",k+("var obj = new constructor("+e+");\nreturn __emval_register(obj);\n}\n")))(nb,f,U);ob[b]=e}return e(a,c,d)},y:function(a,b){a=nb(a,"_emval_take_value");a=a.readValueFromPointer(b);return U(a)},f:function(){x()},h:function(a,b){W(a,b||1);throw"longjmp";},D:function(a,b,c){D.copyWithin(a,b,b+c)},l:function(a){a>>>=
+0;var b=D.length;if(2147483648<a)return!1;for(var c=1;4>=c;c*=2){var d=b*(1+.2/c);d=Math.min(d,a+100663296);d=Math.max(16777216,a,d);0<d%65536&&(d+=65536-d%65536);a:{try{B.grow(Math.min(2147483648,d)-G.byteLength+65535>>>16);ua(B.buffer);var e=1;break a}catch(g){}e=void 0}if(e)return!0}return!1},u:function(){return 0},G:function(a,b,c,d){a=Ka.va(a);b=Ka.ta(a,b,c);F[d>>2]=b;return 0},B:function(){},t:function(a,b,c,d){for(var e=0,g=0;g<c;g++){for(var k=F[b+8*g>>2],h=F[b+(8*g+4)>>2],l=0;l<h;l++){var m=
+D[k+l],n=Ja[a];if(0===m||10===m){for(m=0;n[m]&&!(NaN<=m);)++m;m=ha.decode(n.subarray?n.subarray(0,m):new Uint8Array(n.slice(0,m)));(1===a?da:v)(m);n.length=0}else n.push(m)}e+=h}F[d>>2]=e;return 0},d:function(){return ea|0},i:function(a){var b=Date.now();F[a>>2]=b/1E3|0;F[a+4>>2]=b%1E3*1E3|0;return 0},m:tb,g:ub,r:vb,q:wb,o:xb,e:yb,C:zb,a:B,c:function(a){ea=a|0},F:function(a){switch(a){case 30:return 16384;case 85:return 131072;case 132:case 133:case 12:case 137:case 138:case 15:case 235:case 16:case 17:case 18:case 19:case 20:case 149:case 13:case 10:case 236:case 153:case 9:case 21:case 22:case 159:case 154:case 14:case 77:case 78:case 139:case 80:case 81:case 82:case 68:case 67:case 164:case 11:case 29:case 47:case 48:case 95:case 52:case 51:case 46:case 79:return 200809;
+case 27:case 246:case 127:case 128:case 23:case 24:case 160:case 161:case 181:case 182:case 242:case 183:case 184:case 243:case 244:case 245:case 165:case 178:case 179:case 49:case 50:case 168:case 169:case 175:case 170:case 171:case 172:case 97:case 76:case 32:case 173:case 35:return-1;case 176:case 177:case 7:case 155:case 8:case 157:case 125:case 126:case 92:case 93:case 129:case 130:case 131:case 94:case 91:return 1;case 74:case 60:case 69:case 70:case 4:return 1024;case 31:case 42:case 72:return 32;
+case 87:case 26:case 33:return 2147483647;case 34:case 1:return 47839;case 38:case 36:return 99;case 43:case 37:return 2048;case 0:return 2097152;case 3:return 65536;case 28:return 32768;case 44:return 32767;case 75:return 16384;case 39:return 1E3;case 89:return 700;case 71:return 256;case 40:return 255;case 2:return 100;case 180:return 64;case 25:return 20;case 5:return 16;case 6:return 6;case 73:return 4;case 84:return"object"===typeof navigator?navigator.hardwareConcurrency||1:1}F[Ab()>>2]=28;
+return-1}};
+(function(){function a(e){f.asm=e.exports;K=f.asm.R;L--;f.monitorRunDependencies&&f.monitorRunDependencies(L);0==L&&(null!==Ba&&(clearInterval(Ba),Ba=null),M&&(e=M,M=null,e()))}function b(e){a(e.instance)}function c(e){return Fa().then(function(g){return WebAssembly.instantiate(g,d)}).then(e,function(g){v("failed to asynchronously prepare wasm: "+g);x(g)})}var d={a:Bb};L++;f.monitorRunDependencies&&f.monitorRunDependencies(L);if(f.instantiateWasm)try{return f.instantiateWasm(d,a)}catch(e){return v("Module.instantiateWasm callback failed with error: "+e),
+!1}(function(){return w||"function"!==typeof WebAssembly.instantiateStreaming||Ca()||"function"!==typeof fetch?c(b):fetch(N,{credentials:"same-origin"}).then(function(e){return WebAssembly.instantiateStreaming(e,d).then(b,function(g){v("wasm streaming compile failed: "+g);v("falling back to ArrayBuffer instantiation");return c(b)})})})().catch(ba);return{}})();
+var rb=f.___wasm_call_ctors=function(){return(rb=f.___wasm_call_ctors=f.asm.S).apply(null,arguments)},V=f._free=function(){return(V=f._free=f.asm.T).apply(null,arguments)},sb=f._malloc=function(){return(sb=f._malloc=f.asm.U).apply(null,arguments)},ib=f.___getTypeName=function(){return(ib=f.___getTypeName=f.asm.V).apply(null,arguments)};f.___embind_register_native_and_builtin_types=function(){return(f.___embind_register_native_and_builtin_types=f.asm.W).apply(null,arguments)};
+var Ab=f.___errno_location=function(){return(Ab=f.___errno_location=f.asm.X).apply(null,arguments)},X=f.stackSave=function(){return(X=f.stackSave=f.asm.Y).apply(null,arguments)},Z=f.stackRestore=function(){return(Z=f.stackRestore=f.asm.Z).apply(null,arguments)},W=f._setThrew=function(){return(W=f._setThrew=f.asm._).apply(null,arguments)};f.dynCall_jiiii=function(){return(f.dynCall_jiiii=f.asm.$).apply(null,arguments)};f.dynCall_jiji=function(){return(f.dynCall_jiji=f.asm.aa).apply(null,arguments)};
+function yb(a,b,c){var d=X();try{K.get(a)(b,c)}catch(e){Z(d);if(e!==e+0&&"longjmp"!==e)throw e;W(1,0)}}function xb(a,b){var c=X();try{K.get(a)(b)}catch(d){Z(c);if(d!==d+0&&"longjmp"!==d)throw d;W(1,0)}}function vb(a,b,c,d){var e=X();try{return K.get(a)(b,c,d)}catch(g){Z(e);if(g!==g+0&&"longjmp"!==g)throw g;W(1,0)}}function ub(a,b,c){var d=X();try{return K.get(a)(b,c)}catch(e){Z(d);if(e!==e+0&&"longjmp"!==e)throw e;W(1,0)}}
+function tb(a,b){var c=X();try{return K.get(a)(b)}catch(d){Z(c);if(d!==d+0&&"longjmp"!==d)throw d;W(1,0)}}function wb(a,b,c,d,e,g){var k=X();try{return K.get(a)(b,c,d,e,g)}catch(h){Z(k);if(h!==h+0&&"longjmp"!==h)throw h;W(1,0)}}function zb(a,b,c,d,e){var g=X();try{K.get(a)(b,c,d,e)}catch(k){Z(g);if(k!==k+0&&"longjmp"!==k)throw k;W(1,0)}}var Cb;M=function Db(){Cb||Eb();Cb||(M=Db)};
+function Eb(){function a(){if(!Cb&&(Cb=!0,f.calledRun=!0,!fa)){Ga(xa);Ga(ya);aa(f);if(f.onRuntimeInitialized)f.onRuntimeInitialized();if(f.postRun)for("function"==typeof f.postRun&&(f.postRun=[f.postRun]);f.postRun.length;){var b=f.postRun.shift();za.unshift(b)}Ga(za)}}if(!(0<L)){if(f.preRun)for("function"==typeof f.preRun&&(f.preRun=[f.preRun]);f.preRun.length;)Aa();Ga(wa);0<L||(f.setStatus?(f.setStatus("Running..."),setTimeout(function(){setTimeout(function(){f.setStatus("")},1);a()},1)):a())}}
+f.run=Eb;if(f.preInit)for("function"==typeof f.preInit&&(f.preInit=[f.preInit]);0<f.preInit.length;)f.preInit.pop()();noExitRuntime=!0;Eb();
 
 
   return Module.ready
diff --git a/codecs/basis/enc/basis_enc.wasm b/codecs/basis/enc/basis_enc.wasm
index 0b57ab7c..92b45cb2 100755
Binary files a/codecs/basis/enc/basis_enc.wasm and b/codecs/basis/enc/basis_enc.wasm differ
diff --git a/src/client/lazy-app/util/index.ts b/src/client/lazy-app/util/index.ts
index 3c6dd6bc..eb7d81ed 100644
--- a/src/client/lazy-app/util/index.ts
+++ b/src/client/lazy-app/util/index.ts
@@ -152,6 +152,7 @@ const magicNumberMapInput = [
   [/^\x00\x00\x00 ftypavif\x00\x00\x00\x00/, 'image/avif'],
   [/^\xff\x0a/, 'image/jxl'],
   [/^\x00\x00\x00\x0cJXL \x0d\x0a\x87\x0a/, 'image/jxl'],
+  [/^Bs\x10/, 'image/basisu'],
 ] as const;
 
 export type ImageMimeTypes = typeof magicNumberMapInput[number][1];
diff --git a/src/features/encoders/basis/client/index.tsx b/src/features/encoders/basis/client/index.tsx
new file mode 100644
index 00000000..78f506ef
--- /dev/null
+++ b/src/features/encoders/basis/client/index.tsx
@@ -0,0 +1,112 @@
+import { EncodeOptions, defaultOptions } from '../shared/meta';
+import type WorkerBridge from 'client/lazy-app/worker-bridge';
+import { h, Component } from 'preact';
+import { preventDefault, shallowEqual } from 'client/lazy-app/util';
+import * as style from 'client/lazy-app/Compress/Options/style.css';
+import Checkbox from 'client/lazy-app/Compress/Options/Checkbox';
+import Expander from 'client/lazy-app/Compress/Options/Expander';
+import Select from 'client/lazy-app/Compress/Options/Select';
+import Range from 'client/lazy-app/Compress/Options/Range';
+import linkState from 'linkstate';
+import Revealer from 'client/lazy-app/Compress/Options/Revealer';
+
+export const encode = (
+  signal: AbortSignal,
+  workerBridge: WorkerBridge,
+  imageData: ImageData,
+  options: EncodeOptions,
+) => workerBridge.basisEncode(signal, imageData, options);
+
+interface Props {
+  options: EncodeOptions;
+  onChange(newOptions: EncodeOptions): void;
+}
+
+interface State {
+  options: EncodeOptions;
+  showAdvanced: boolean;
+}
+
+export class Options extends Component<Props, State> {
+  static getDerivedStateFromProps(
+    props: Props,
+    state: State,
+  ): Partial<State> | null {
+    if (state.options && shallowEqual(state.options, props.options)) {
+      return null;
+    }
+
+    const { options } = props;
+
+    return {
+      options,
+    };
+  }
+
+  // The rest of the defaults are set in getDerivedStateFromProps
+  state: State = {
+    showAdvanced: false,
+  } as State;
+
+  private _inputChangeCallbacks = new Map<string, (event: Event) => void>();
+
+  private _inputChange = (
+    prop: keyof State,
+    type: 'number' | 'boolean' | 'string',
+  ) => {
+    // Cache the callback for performance
+    if (!this._inputChangeCallbacks.has(prop)) {
+      this._inputChangeCallbacks.set(prop, (event: Event) => {
+        const formEl = event.target as HTMLInputElement | HTMLSelectElement;
+        const newVal =
+          type === 'boolean'
+            ? 'checked' in formEl
+              ? formEl.checked
+              : !!formEl.value
+            : type === 'number'
+            ? Number(formEl.value)
+            : formEl.value;
+
+        const newState: Partial<State> = {
+          [prop]: newVal,
+        };
+
+        const optionState = {
+          ...this.state,
+          ...newState,
+        };
+
+        const newOptions: EncodeOptions = {};
+
+        // Updating options, so we don't recalculate in getDerivedStateFromProps.
+        newState.options = newOptions;
+
+        this.setState(
+          // It isn't clear to me why I have to cast this :)
+          newState as State,
+        );
+
+        this.props.onChange(newOptions);
+      });
+    }
+
+    return this._inputChangeCallbacks.get(prop)!;
+  };
+
+  render(_: Props, {}: State) {
+    return (
+      <form class={style.optionsSection} onSubmit={preventDefault}>
+        <div class={style.optionOneCell}>
+          <Range
+            min="0"
+            max="4"
+            // value={quality}
+            // onInput={this._inputChange('quality', 'number')}
+          >
+            Quality:
+          </Range>
+        </div>
+      </form>
+    );
+  }
+}
diff --git a/src/features/encoders/basis/shared/meta.ts b/src/features/encoders/basis/shared/meta.ts
new file mode 100644
index 00000000..7f640f15
--- /dev/null
+++ b/src/features/encoders/basis/shared/meta.ts
@@ -0,0 +1,20 @@
+/**
+ * Copyright 2020 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { EncodeOptions } from 'codecs/basis/enc/basis_enc';
+
+export { EncodeOptions };
+
+export const label = 'Basis';
+export const mimeType = 'image/basisu';
+export const extension = 'basis';
+export const defaultOptions: EncodeOptions = {};
diff --git a/src/features/encoders/basis/shared/missing-types.d.ts b/src/features/encoders/basis/shared/missing-types.d.ts
new file mode 100644
index 00000000..c729fd74
--- /dev/null
+++ b/src/features/encoders/basis/shared/missing-types.d.ts
@@ -0,0 +1,13 @@
+/**
+ * Copyright 2020 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/// <reference path="../../../../../missing-types.d.ts" />
diff --git a/src/features/encoders/basis/worker/basisEncode.ts b/src/features/encoders/basis/worker/basisEncode.ts
new file mode 100644
index 00000000..e872a670
--- /dev/null
+++ b/src/features/encoders/basis/worker/basisEncode.ts
@@ -0,0 +1,37 @@
+/**
+ * Copyright 2020 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import type { BasisModule } from 'codecs/basis/enc/basis_enc';
+import type { EncodeOptions } from '../shared/meta';
+import wasmUrl from 'url:codecs/basis/enc/basis_enc.wasm';
+import { initEmscriptenModule } from 'features/worker-utils';
+
+let emscriptenModule: Promise<BasisModule>;
+
+async function init() {
+  const basisEncoder = await import('codecs/basis/enc/basis_enc.js');
+  return initEmscriptenModule(basisEncoder.default, wasmUrl);
+}
+
+export default async function encode(
+  data: ImageData,
+  options: EncodeOptions,
+): Promise<ArrayBuffer> {
+  if (!emscriptenModule) emscriptenModule = init();
+
+  const module = await emscriptenModule;
+  const result = module.encode(data.data, data.width, data.height, options);
+
+  if (!result) throw new Error('Encoding error');
+
+  return result.buffer;
+}
diff --git a/src/features/encoders/basis/worker/missing-types.d.ts b/src/features/encoders/basis/worker/missing-types.d.ts
new file mode 100644
index 00000000..c729fd74
--- /dev/null
+++ b/src/features/encoders/basis/worker/missing-types.d.ts
@@ -0,0 +1,13 @@
+/**
+ * Copyright 2020 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/// <reference path="../../../../../missing-types.d.ts" />