diff --git a/codecs/oxipng/Cargo.lock b/codecs/oxipng/Cargo.lock
index 7b304a0c1..a8b333c9a 100644
--- a/codecs/oxipng/Cargo.lock
+++ b/codecs/oxipng/Cargo.lock
@@ -2,12 +2,6 @@
 # It is not intended for manual editing.
 version = 3
 
-[[package]]
-name = "autocfg"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
-
 [[package]]
 name = "bitvec"
 version = "1.0.1"
@@ -22,21 +16,21 @@ dependencies = [
 
 [[package]]
 name = "bumpalo"
-version = "3.4.0"
+version = "3.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e8c087f005730276d1096a652e92a8bacee2e2472bcc9715a74d2bec38b5820"
+checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
 
 [[package]]
 name = "bytemuck"
-version = "1.14.0"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "374d28ec25809ee0e23827c2ab573d729e293f281dfe393500e7ad618baa61c6"
+checksum = "5d6d68c57235a3a081186990eca2867354726650f42f7516ca50c28d6281fd15"
 
 [[package]]
 name = "cc"
-version = "1.0.66"
+version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c0496836a84f8d0495758516b8621a622beb77c0fed418570e50764093ced48"
+checksum = "17f6e324229dc011159fcc089755d1e2e216a90d43a7dea6853ca740b84f35e7"
 
 [[package]]
 name = "cfg-if"
@@ -45,51 +39,53 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
-name = "crossbeam-channel"
-version = "0.5.10"
+name = "crc32fast"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "82a9b73a36529d9c47029b9fb3a6f0ea3cc916a261195352ba19e770fc1748b2"
+checksum = "b3855a8a784b474f333699ef2bbca9db2c4a1f6d9088a90a2d25b1eb53111eaa"
 dependencies = [
  "cfg-if",
+]
+
+[[package]]
+name = "crossbeam-channel"
+version = "0.5.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ab3db02a9c5b5121e1e42fbdb1aeb65f5e02624cc58c43f2884c6ccac0b82f95"
+dependencies = [
  "crossbeam-utils",
 ]
 
 [[package]]
 name = "crossbeam-deque"
-version = "0.8.4"
+version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fca89a0e215bab21874660c67903c5f143333cab1da83d041c7ded6053774751"
+checksum = "613f8cc01fe9cf1a3eb3d7f488fd2fa8388403e97039e2f73692932e291a770d"
 dependencies = [
- "cfg-if",
  "crossbeam-epoch",
  "crossbeam-utils",
 ]
 
 [[package]]
 name = "crossbeam-epoch"
-version = "0.9.17"
+version = "0.9.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0e3681d554572a651dda4186cd47240627c3d0114d45a95f6ad27f2f22e7548d"
+checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
 dependencies = [
- "autocfg",
- "cfg-if",
  "crossbeam-utils",
 ]
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.8.18"
+version = "0.8.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3a430a770ebd84726f584a90ee7f020d28db52c6d02138900f22341f866d39c"
-dependencies = [
- "cfg-if",
-]
+checksum = "248e3bacc7dc6baa3b21e405ee045c3047101a49145e7e9eca583ab4c2ca5345"
 
 [[package]]
 name = "either"
-version = "1.6.1"
+version = "1.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
+checksum = "a47c1c47d2f5964e29c61246e81db715514cd532db6b5116a25ea3c03d6780a2"
 
 [[package]]
 name = "equivalent"
@@ -111,9 +107,9 @@ checksum = "290f1a1d9242c78d09ce40a5e87e7554ee637af1351968159f4952f028f75604"
 
 [[package]]
 name = "indexmap"
-version = "2.1.0"
+version = "2.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d530e1a18b1cb4c484e6e34556a0d948706958449fca0cab753d649f2bce3d1f"
+checksum = "168fb715dda47215e360912c096649d23d58bf392ac62f73919e831745e40f26"
 dependencies = [
  "equivalent",
  "hashbrown",
@@ -122,42 +118,42 @@ dependencies = [
 
 [[package]]
 name = "js-sys"
-version = "0.3.48"
+version = "0.3.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc9f84f9b115ce7843d60706df1422a916680bfdfcbdb0447c5614ff9d7e4d78"
+checksum = "29c15563dc2726973df627357ce0c9ddddbea194836909d655df6a75d2cf296d"
 dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "lazy_static"
-version = "1.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
-
 [[package]]
 name = "libdeflate-sys"
-version = "1.19.0"
+version = "1.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "67921a7f85100c1559efc3d1c7c472091b7da05f304b4bbd5356f075e97f1cc2"
+checksum = "669ea17f9257bcb48c09c7ee4bef3957777504acffac557263e20c11001977bc"
 dependencies = [
  "cc",
 ]
 
 [[package]]
 name = "libdeflater"
-version = "1.19.0"
+version = "1.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3a31b22f662350ec294b13859f935aea772ba7b2bc8776269f4a5627308eab7d"
+checksum = "8dfd6424f7010ee0a3416f1d796d0450e3ad3ac237a237644f728277c4ded016"
 dependencies = [
  "libdeflate-sys",
 ]
 
 [[package]]
 name = "log"
-version = "0.4.20"
+version = "0.4.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
+
+[[package]]
+name = "once_cell"
+version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
+checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
 [[package]]
 name = "oxipng"
@@ -174,22 +170,23 @@ dependencies = [
  "rgb",
  "rustc-hash",
  "rustc_version",
+ "zopfli",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.26"
+version = "1.0.81"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a152013215dca273577e18d2bf00fa862b89b24169fb78c4c95aeb07992c9cec"
+checksum = "3d1597b0c024618f09a9c3b8655b7e430397a36d23fdafec26d6965e9eec3eba"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.8"
+version = "1.0.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "991431c3519a3f36861882da93630ce66b52918dcf1b8e2fd66b397fc96f28df"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 dependencies = [
  "proc-macro2",
 ]
@@ -202,22 +199,24 @@ checksum = "dc33ff2d4973d518d823d61aa239014831e521c75da58e3df4840d3f47749d09"
 
 [[package]]
 name = "rayon"
-version = "1.8.0"
+version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c27db03db7734835b3f53954b534c91069375ce6ccaa2e065441e07d9b6cdb1"
+checksum = "b418a60154510ca1a002a752ca9714984e21e4241e804d32555251faf8b78ffa"
 dependencies = [
  "either",
  "rayon-core",
+ "wasm_sync",
 ]
 
 [[package]]
 name = "rayon-core"
-version = "1.12.0"
+version = "1.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ce3fb6ad83f861aac485e76e1985cd109d9a3713802152be56c3b1f0e0658ed"
+checksum = "1465873a3dfdaa8ae7cb14b4383657caab0b3e8a0aa9ae8e04b044854c8dfce2"
 dependencies = [
  "crossbeam-deque",
  "crossbeam-utils",
+ "wasm_sync",
 ]
 
 [[package]]
@@ -246,15 +245,15 @@ dependencies = [
 
 [[package]]
 name = "semver"
-version = "1.0.21"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b97ed7a9823b74f99c7742f5336af7be5ecd3eeafcb1507d1fa93347b1d589b0"
+checksum = "92d43fe69e652f3df9bdc2b85b2854a0825b86e4fb76bc44d945137d053639ca"
 
 [[package]]
-name = "spmc"
-version = "0.3.0"
+name = "simd-adler32"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02a8428da277a8e3a15271d79943e80ccc2ef254e78813a166a08d65e4c3ece5"
+checksum = "d66dc143e6b11c1eddc06d5c423cfc97062865baf299914ab64caa38182078fe"
 
 [[package]]
 name = "squoosh-oxipng"
@@ -268,13 +267,13 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.72"
+version = "2.0.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1e8cdbefb79a9a5a65e0db8b47b723ee907b7c7f8496c76a1770b5c310bab82"
+checksum = "909518bc7b1c9b779f1bbf07f2929d35af9f0f37e47c6e9ef7f9dddc1e1821f3"
 dependencies = [
  "proc-macro2",
  "quote",
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -284,16 +283,22 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
 
 [[package]]
-name = "unicode-xid"
-version = "0.2.1"
+name = "typed-arena"
+version = "2.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6af6ae20167a9ece4bcb41af5b80f8a1f1df981f6391189ce00fd257af04126a"
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.74"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d54ee1d4ed486f78874278e63e4069fc1ab9f6a18ca492076ffb90c5eb2997fd"
+checksum = "4be2531df63900aeb2bca0daaaddec08491ee64ceecbee5076636a3b026795a8"
 dependencies = [
  "cfg-if",
  "wasm-bindgen-macro",
@@ -301,13 +306,13 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.74"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b33f6a0694ccfea53d94db8b2ed1c3a8a4c86dd936b13b9f0a15ec4a451b900"
+checksum = "614d787b966d3989fa7bb98a654e369c762374fd3213d212cfc0251257e747da"
 dependencies = [
  "bumpalo",
- "lazy_static",
  "log",
+ "once_cell",
  "proc-macro2",
  "quote",
  "syn",
@@ -316,9 +321,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.74"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "088169ca61430fe1e58b8096c24975251700e7b1f6fd91cc9d59b04fb9b18bd4"
+checksum = "a1f8823de937b71b9460c0c34e25f3da88250760bec0ebac694b49997550d726"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -326,9 +331,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.74"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be2241542ff3d9f241f5e2cb6dd09b37efe786df8851c54957683a49f0987a97"
+checksum = "e94f17b526d0a461a191c78ea52bbce64071ed5c04c9ffe424dcb38f74171bb7"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -339,21 +344,42 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-rayon"
-version = "1.0.1"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3069d2a42e7a7e3bfde668f84adb5fbc35701ca2b39b27a064cbd5ede4e78194"
+checksum = "c9e02b7785fe15de188657b7d3a234ef042bfd8da10822016915e06d4e29cba7"
 dependencies = [
+ "crossbeam-channel",
  "js-sys",
  "rayon",
- "spmc",
  "wasm-bindgen",
 ]
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.74"
+version = "0.2.92"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "af190c94f2773fdb3729c55b007a722abb5384da03bc0986df4c289bf5567e96"
+
+[[package]]
+name = "wasm_sync"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cff360cade7fec41ff0e9d2cda57fe58258c5f16def0e21302394659e6bbb0ea"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "web-sys"
+version = "0.3.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7cff876b8f18eed75a66cf49b65e7f967cb354a7aa16003fb55dbfd25b44b4f"
+checksum = "77afa9a11836342370f4817622a2f0f418b134426d91a82dfb48f532d2ec13ef"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
 
 [[package]]
 name = "wyz"
@@ -363,3 +389,15 @@ checksum = "05f360fc0b24296329c78fda852a1e9ae82de9cf7b27dae4b7f62f118f77b9ed"
 dependencies = [
  "tap",
 ]
+
+[[package]]
+name = "zopfli"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c1f48f3508a3a3f2faee01629564400bc12260f6214a056d06a3aaaa6ef0736"
+dependencies = [
+ "crc32fast",
+ "log",
+ "simd-adler32",
+ "typed-arena",
+]
diff --git a/codecs/oxipng/Cargo.toml b/codecs/oxipng/Cargo.toml
index 8951fe788..521da2e48 100644
--- a/codecs/oxipng/Cargo.toml
+++ b/codecs/oxipng/Cargo.toml
@@ -12,7 +12,7 @@ wasm-opt = ["-O", "--no-validation"]
 crate-type = ["cdylib"]
 
 [dependencies]
-oxipng = { version = "9.0", default-features = false, features = ["freestanding"] }
+oxipng = { version = "9.0", default-features = false, features = ["freestanding", "zopfli"] }
 wasm-bindgen = "0.2.73"
 log = { version = "0.4.11", features = ["release_max_level_off"] }
 wasm-bindgen-rayon = { version = "1.0", optional = true }
@@ -22,4 +22,4 @@ lto = true
 opt-level = "s"
 
 [features]
-parallel = ["oxipng/parallel", "wasm-bindgen-rayon"]
+parallel = ["oxipng/parallel", "wasm-bindgen-rayon", "oxipng/zopfli"]
diff --git a/codecs/oxipng/pkg-parallel/squoosh_oxipng.d.ts b/codecs/oxipng/pkg-parallel/squoosh_oxipng.d.ts
index b776436b0..978363059 100644
--- a/codecs/oxipng/pkg-parallel/squoosh_oxipng.d.ts
+++ b/codecs/oxipng/pkg-parallel/squoosh_oxipng.d.ts
@@ -1,14 +1,29 @@
 /* tslint:disable */
 /* eslint-disable */
+
+import { Deflaters } from "features/encoders/oxiPNG/shared/meta";
+
 /**
 * @param {Uint8ClampedArray} data
 * @param {number} width
 * @param {number} height
 * @param {number} level
 * @param {boolean} interlace
+* @param {Deflaters} deflater
+* @param {number} iterations
+* @param {number} compressionLevel
 * @returns {Uint8Array}
 */
-export function optimise(data: Uint8ClampedArray, width: number, height: number, level: number, interlace: boolean): Uint8Array;
+export function optimise(
+  data: Uint8ClampedArray, 
+  width: number, 
+  height: number, 
+  level: number, 
+  interlace: boolean, 
+  deflater: Deflaters, 
+  iterations: number, 
+  compressionLevel: number,
+): Uint8Array;
 /**
 * @param {number} num_threads
 * @returns {Promise<any>}
@@ -38,7 +53,7 @@ export class wbg_rayon_PoolBuilder {
 export type InitInput = RequestInfo | URL | Response | BufferSource | WebAssembly.Module;
 
 export interface InitOutput {
-  readonly optimise: (a: number, b: number, c: number, d: number, e: number, f: number, g: number) => void;
+  readonly optimise: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number) => void;
   readonly __wbg_wbg_rayon_poolbuilder_free: (a: number) => void;
   readonly wbg_rayon_poolbuilder_numThreads: (a: number) => number;
   readonly wbg_rayon_poolbuilder_receiver: (a: number) => number;
diff --git a/codecs/oxipng/pkg-parallel/squoosh_oxipng.js b/codecs/oxipng/pkg-parallel/squoosh_oxipng.js
index b857edafc..a8639802c 100644
--- a/codecs/oxipng/pkg-parallel/squoosh_oxipng.js
+++ b/codecs/oxipng/pkg-parallel/squoosh_oxipng.js
@@ -59,14 +59,17 @@ function getArrayU8FromWasm0(ptr, len) {
 * @param {number} height
 * @param {number} level
 * @param {boolean} interlace
+* @param {Deflaters} deflater
+* @param {number} iterations
+* @param {number} compressionLevel
 * @returns {Uint8Array}
 */
-export function optimise(data, width, height, level, interlace) {
+export function optimise(data, width, height, level, interlace, deflater, iterations, compressionLevel) {
     try {
         const retptr = wasm.__wbindgen_add_to_stack_pointer(-16);
         var ptr0 = passArray8ToWasm0(data, wasm.__wbindgen_malloc);
         var len0 = WASM_VECTOR_LEN;
-        wasm.optimise(retptr, ptr0, len0, width, height, level, interlace);
+        wasm.optimise(retptr, ptr0, len0, width, height, level, interlace, deflater, iterations, compressionLevel);
         var r0 = getInt32Memory0()[retptr / 4 + 0];
         var r1 = getInt32Memory0()[retptr / 4 + 1];
         var v1 = getArrayU8FromWasm0(r0, r1).slice();
diff --git a/codecs/oxipng/pkg-parallel/squoosh_oxipng_bg.wasm.d.ts b/codecs/oxipng/pkg-parallel/squoosh_oxipng_bg.wasm.d.ts
index e47f8eb5a..88302920c 100644
--- a/codecs/oxipng/pkg-parallel/squoosh_oxipng_bg.wasm.d.ts
+++ b/codecs/oxipng/pkg-parallel/squoosh_oxipng_bg.wasm.d.ts
@@ -1,6 +1,6 @@
 /* tslint:disable */
 /* eslint-disable */
-export function optimise(a: number, b: number, c: number, d: number, e: number, f: number, g: number): void;
+export function optimise(a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number): void;
 export function __wbg_wbg_rayon_poolbuilder_free(a: number): void;
 export function wbg_rayon_poolbuilder_numThreads(a: number): number;
 export function wbg_rayon_poolbuilder_receiver(a: number): number;
diff --git a/codecs/oxipng/pkg/squoosh_oxipng.d.ts b/codecs/oxipng/pkg/squoosh_oxipng.d.ts
index a82fca90e..659600d78 100644
--- a/codecs/oxipng/pkg/squoosh_oxipng.d.ts
+++ b/codecs/oxipng/pkg/squoosh_oxipng.d.ts
@@ -1,20 +1,35 @@
 /* tslint:disable */
 /* eslint-disable */
+
+import { Deflaters } from "features/encoders/oxiPNG/shared/meta";
+
 /**
 * @param {Uint8ClampedArray} data
 * @param {number} width
 * @param {number} height
 * @param {number} level
 * @param {boolean} interlace
+* @param {Deflaters} deflater
+* @param {number} iterations
+* @param {number} compressionLevel
 * @returns {Uint8Array}
 */
-export function optimise(data: Uint8ClampedArray, width: number, height: number, level: number, interlace: boolean): Uint8Array;
+export function optimise(
+  data: Uint8ClampedArray, 
+  width: number, 
+  height: number, 
+  level: number, 
+  interlace: boolean,
+  deflater: Deflaters, 
+  iterations: number, 
+  compressionLevel: number,
+): Uint8Array;
 
 export type InitInput = RequestInfo | URL | Response | BufferSource | WebAssembly.Module;
 
 export interface InitOutput {
   readonly memory: WebAssembly.Memory;
-  readonly optimise: (a: number, b: number, c: number, d: number, e: number, f: number, g: number) => void;
+  readonly optimise: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number) => void;
   readonly __wbindgen_add_to_stack_pointer: (a: number) => number;
   readonly __wbindgen_malloc: (a: number) => number;
   readonly __wbindgen_free: (a: number, b: number) => void;
diff --git a/codecs/oxipng/pkg/squoosh_oxipng.js b/codecs/oxipng/pkg/squoosh_oxipng.js
index eb9bb70e3..9239da99a 100644
--- a/codecs/oxipng/pkg/squoosh_oxipng.js
+++ b/codecs/oxipng/pkg/squoosh_oxipng.js
@@ -43,14 +43,17 @@ function getArrayU8FromWasm0(ptr, len) {
 * @param {number} height
 * @param {number} level
 * @param {boolean} interlace
+* @param {Deflaters} deflater
+* @param {number} iterations
+* @param {number} compressionLevel
 * @returns {Uint8Array}
 */
-export function optimise(data, width, height, level, interlace) {
+export function optimise(data, width, height, level, interlace, deflater, iterations, compressionLevel) {
     try {
         const retptr = wasm.__wbindgen_add_to_stack_pointer(-16);
         var ptr0 = passArray8ToWasm0(data, wasm.__wbindgen_malloc);
         var len0 = WASM_VECTOR_LEN;
-        wasm.optimise(retptr, ptr0, len0, width, height, level, interlace);
+        wasm.optimise(retptr, ptr0, len0, width, height, level, interlace, deflater, iterations, compressionLevel);
         var r0 = getInt32Memory0()[retptr / 4 + 0];
         var r1 = getInt32Memory0()[retptr / 4 + 1];
         var v1 = getArrayU8FromWasm0(r0, r1).slice();
diff --git a/codecs/oxipng/pkg/squoosh_oxipng_bg.wasm.d.ts b/codecs/oxipng/pkg/squoosh_oxipng_bg.wasm.d.ts
index a5eaf8565..613d92800 100644
--- a/codecs/oxipng/pkg/squoosh_oxipng_bg.wasm.d.ts
+++ b/codecs/oxipng/pkg/squoosh_oxipng_bg.wasm.d.ts
@@ -1,7 +1,7 @@
 /* tslint:disable */
 /* eslint-disable */
 export const memory: WebAssembly.Memory;
-export function optimise(a: number, b: number, c: number, d: number, e: number, f: number, g: number): void;
+export function optimise(a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number): void;
 export function __wbindgen_add_to_stack_pointer(a: number): number;
 export function __wbindgen_malloc(a: number): number;
 export function __wbindgen_free(a: number, b: number): void;
diff --git a/codecs/oxipng/src/lib.rs b/codecs/oxipng/src/lib.rs
index 1047a2ab4..f1a033019 100644
--- a/codecs/oxipng/src/lib.rs
+++ b/codecs/oxipng/src/lib.rs
@@ -1,7 +1,8 @@
 #[cfg(feature = "parallel")]
 pub use wasm_bindgen_rayon::init_thread_pool;
 
-use oxipng::{BitDepth, ColorType, Interlacing};
+use oxipng::{BitDepth, ColorType, Deflaters, Interlacing};
+use std::num::NonZeroU8;
 use wasm_bindgen::prelude::*;
 use wasm_bindgen::Clamped;
 
@@ -12,9 +13,22 @@ pub fn optimise(
     height: u32,
     level: u8,
     interlace: bool,
+    deflater: u8,
+    iterations: u8,
+    compression_level: u8,
 ) -> Vec<u8> {
+    let def = match deflater {
+        0 => Deflaters::Libdeflater {
+            compression: compression_level,
+        },
+        1 => Deflaters::Zopfli {
+            iterations: NonZeroU8::new(iterations).unwrap(),
+        },
+        _ => panic!("Invalid deflater id"),
+    };
     let mut options = oxipng::Options::from_preset(level);
     options.optimize_alpha = true;
+    options.deflate = def;
     options.interlace = Some(if interlace {
         Interlacing::Adam7
     } else {
diff --git a/src/features/encoders/oxiPNG/client/index.tsx b/src/features/encoders/oxiPNG/client/index.tsx
index e16b8e7ca..c597d4997 100644
--- a/src/features/encoders/oxiPNG/client/index.tsx
+++ b/src/features/encoders/oxiPNG/client/index.tsx
@@ -1,11 +1,12 @@
 import { inputFieldChecked } from 'client/lazy-app/util';
-import { EncodeOptions } from '../shared/meta';
+import { defaultOptions, Deflaters, EncodeOptions } from '../shared/meta';
 import type WorkerBridge from 'client/lazy-app/worker-bridge';
 import { h, Component } from 'preact';
 import { inputFieldValueAsNumber, preventDefault } from 'client/lazy-app/util';
 import * as style from 'client/lazy-app/Compress/Options/style.css';
 import Range from 'client/lazy-app/Compress/Options/Range';
 import Checkbox from 'client/lazy-app/Compress/Options/Checkbox';
+import Select from 'client/lazy-app/Compress/Options/Select';
 
 export async function encode(
   signal: AbortSignal,
@@ -30,7 +31,11 @@ export class Options extends Component<Props, {}> {
     const options: EncodeOptions = {
       level: inputFieldValueAsNumber(form.level),
       interlace: inputFieldChecked(form.interlace),
+      deflater: inputFieldValueAsNumber(form.deflater),
+      iterations: inputFieldValueAsNumber(form.iterations, 5),
+      compressionLevel: inputFieldValueAsNumber(form.compressionLevel, 11),
     };
+
     this.props.onChange(options);
   };
 
@@ -57,6 +62,45 @@ export class Options extends Component<Props, {}> {
             Effort:
           </Range>
         </div>
+        <label class={style.optionTextFirst}>
+          Deflater:
+          <Select
+            name="deflater"
+            value={options.deflater}
+            onChange={this.onChange}
+          >
+            <option value={Deflaters.libdeflater}>Libdeflater</option>
+            <option value={Deflaters.zopfli}>Zopfli</option>
+          </Select>
+        </label>
+        {this.props.options.deflater == Deflaters.libdeflater && (
+          <div class={style.optionOneCell}>
+            <Range
+              name="compressionLevel"
+              min="1"
+              max="12"
+              step="1"
+              value={options.compressionLevel}
+              onInput={this.onChange}
+            >
+              Compression level:
+            </Range>
+          </div>
+        )}
+        {this.props.options.deflater == Deflaters.zopfli && (
+          <div class={style.optionOneCell}>
+            <Range
+              name="iterations"
+              min="1"
+              max="15"
+              step="1"
+              value={options.iterations}
+              onInput={this.onChange}
+            >
+              Iterations:
+            </Range>
+          </div>
+        )}
       </form>
     );
   }
diff --git a/src/features/encoders/oxiPNG/shared/meta.ts b/src/features/encoders/oxiPNG/shared/meta.ts
index 7ee614005..6cbf1fcc2 100644
--- a/src/features/encoders/oxiPNG/shared/meta.ts
+++ b/src/features/encoders/oxiPNG/shared/meta.ts
@@ -10,9 +10,17 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+export const enum Deflaters {
+  libdeflater,
+  zopfli,
+}
+
 export interface EncodeOptions {
   level: number;
   interlace: boolean;
+  deflater: Deflaters;
+  iterations: number;
+  compressionLevel: number;
 }
 
 export const label = 'OxiPNG';
@@ -22,4 +30,7 @@ export const extension = 'png';
 export const defaultOptions: EncodeOptions = {
   level: 2,
   interlace: false,
+  deflater: Deflaters.libdeflater,
+  iterations: 5,
+  compressionLevel: 11,
 };
diff --git a/src/features/encoders/oxiPNG/worker/oxipngEncode.ts b/src/features/encoders/oxiPNG/worker/oxipngEncode.ts
index f964f91d8..e9b9e0ca7 100644
--- a/src/features/encoders/oxiPNG/worker/oxipngEncode.ts
+++ b/src/features/encoders/oxiPNG/worker/oxipngEncode.ts
@@ -51,5 +51,8 @@ export default async function encode(
     data.height,
     options.level,
     options.interlace,
+    options.deflater,
+    options.iterations,
+    options.compressionLevel,
   ).buffer;
 }