diff --git a/libsquoosh/src/codecs.ts b/libsquoosh/src/codecs.ts
index c0410221..ca905f9b 100644
--- a/libsquoosh/src/codecs.ts
+++ b/libsquoosh/src/codecs.ts
@@ -61,6 +61,7 @@ import mozEnc from '../../codecs/mozjpeg/enc/mozjpeg_node_enc.js';
 import mozEncWasm from 'asset-url:../../codecs/mozjpeg/enc/mozjpeg_node_enc.wasm';
 import mozDec from '../../codecs/mozjpeg/dec/mozjpeg_node_dec.js';
 import mozDecWasm from 'asset-url:../../codecs/mozjpeg/dec/mozjpeg_node_dec.wasm';
+import type { EncodeOptions as MozJPEGEncodeOptions } from '../../codecs/mozjpeg/enc/mozjpeg_enc';
 
 // WebP
 import type { WebPModule as WebPEncodeModule } from '../../codecs/webp/enc/webp_enc';
@@ -68,6 +69,7 @@ import webpEnc from '../../codecs/webp/enc/webp_node_enc.js';
 import webpEncWasm from 'asset-url:../../codecs/webp/enc/webp_node_enc.wasm';
 import webpDec from '../../codecs/webp/dec/webp_node_dec.js';
 import webpDecWasm from 'asset-url:../../codecs/webp/dec/webp_node_dec.wasm';
+import type { EncodeOptions as WebPEncodeOptions } from '../../codecs/webp/enc/webp_enc.js';
 
 // AVIF
 import type { AVIFModule as AVIFEncodeModule } from '../../codecs/avif/enc/avif_enc';
@@ -78,6 +80,7 @@ import avifEncMtWorker from 'chunk-url:../../codecs/avif/enc/avif_node_enc_mt.wo
 import avifEncMtWasm from 'asset-url:../../codecs/avif/enc/avif_node_enc_mt.wasm';
 import avifDec from '../../codecs/avif/dec/avif_node_dec.js';
 import avifDecWasm from 'asset-url:../../codecs/avif/dec/avif_node_dec.wasm';
+import type { EncodeOptions as AvifEncodeOptions } from '../../codecs/avif/enc/avif_enc.js';
 
 // JXL
 import type { JXLModule as JXLEncodeModule } from '../../codecs/jxl/enc/jxl_enc';
@@ -85,6 +88,7 @@ import jxlEnc from '../../codecs/jxl/enc/jxl_node_enc.js';
 import jxlEncWasm from 'asset-url:../../codecs/jxl/enc/jxl_node_enc.wasm';
 import jxlDec from '../../codecs/jxl/dec/jxl_node_dec.js';
 import jxlDecWasm from 'asset-url:../../codecs/jxl/dec/jxl_node_dec.wasm';
+import type { EncodeOptions as JxlEncodeOptions } from '../../codecs/jxl/enc/jxl_enc.js';
 
 // WP2
 import type { WP2Module as WP2EncodeModule } from '../../codecs/wp2/enc/wp2_enc';
@@ -92,6 +96,7 @@ import wp2Enc from '../../codecs/wp2/enc/wp2_node_enc.js';
 import wp2EncWasm from 'asset-url:../../codecs/wp2/enc/wp2_node_enc.wasm';
 import wp2Dec from '../../codecs/wp2/dec/wp2_node_dec.js';
 import wp2DecWasm from 'asset-url:../../codecs/wp2/dec/wp2_node_dec.wasm';
+import type { EncodeOptions as WP2EncodeOptions } from '../../codecs/wp2/enc/wp2_enc.js';
 
 // PNG
 import * as pngEncDec from '../../codecs/png/pkg/squoosh_png.js';
@@ -104,6 +109,9 @@ const pngEncDecPromise = pngEncDec.default(
 import * as oxipng from '../../codecs/oxipng/pkg/squoosh_oxipng.js';
 import oxipngWasm from 'asset-url:../../codecs/oxipng/pkg/squoosh_oxipng_bg.wasm';
 const oxipngPromise = oxipng.default(fsp.readFile(pathify(oxipngWasm)));
+interface OxiPngEncodeOptions {
+  level: number;
+}
 
 // Resize
 import * as resize from '../../codecs/resize/pkg/squoosh_resize.js';
@@ -404,13 +412,13 @@ export const codecs = {
         jxlEncWasm,
       ),
     defaultEncoderOptions: {
-      speed: 4,
+      effort: 1,
       quality: 75,
       progressive: false,
       epf: -1,
-      nearLossless: 0,
       lossyPalette: false,
       decodingSpeedTier: 0,
+      photonNoiseIso: 0,
     },
     autoOptimize: {
       option: 'quality',
@@ -483,3 +491,12 @@ export const codecs = {
     },
   },
 } as const;
+
+export {
+  MozJPEGEncodeOptions,
+  WebPEncodeOptions,
+  AvifEncodeOptions,
+  JxlEncodeOptions,
+  WP2EncodeOptions,
+  OxiPngEncodeOptions,
+};
diff --git a/libsquoosh/src/index.ts b/libsquoosh/src/index.ts
index 8a8880e8..65c9bec8 100644
--- a/libsquoosh/src/index.ts
+++ b/libsquoosh/src/index.ts
@@ -3,11 +3,17 @@ import { cpus } from 'os';
 import { promises as fsp } from 'fs';
 
 import {
+  AvifEncodeOptions,
   codecs as encoders,
+  JxlEncodeOptions,
+  MozJPEGEncodeOptions,
+  OxiPngEncodeOptions,
   preprocessors,
   QuantOptions,
   ResizeOptions,
   RotateOptions,
+  WebPEncodeOptions,
+  WP2EncodeOptions,
 } from './codecs.js';
 import WorkerPool from './worker_pool.js';
 import { autoOptimize } from './auto-optimizer.js';
@@ -229,7 +235,12 @@ class Image {
       optimizerButteraugliTarget?: number;
       maxOptimizerRounds?: number;
     } & {
-      [key in EncoderKey]?: any; // any is okay for now
+      mozjpeg?: Partial<MozJPEGEncodeOptions>;
+      webp?: Partial<WebPEncodeOptions>;
+      avif?: Partial<AvifEncodeOptions>;
+      jxl?: Partial<JxlEncodeOptions>;
+      wp2?: Partial<WP2EncodeOptions>;
+      oxipng?: Partial<OxiPngEncodeOptions>;
     } = {},
   ): Promise<void> {
     const { bitmap } = await this.decoded;