Project Url: ChuckerTeam/chucker
Introduction: 🔎More Chucker than Chuck - An HTTP inspector for Android & OkHTTP (like Charles but on device)
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A fork of Chuck

chucker icon

Chucker simplifies the inspection of HTTP(S) requests/responses, and Throwables fired by your Android App. Chucker works as an OkHttp Interceptor persisting all those events inside your application, and providing a UI for inspecting and sharing their content.

Apps using Chucker will display a push notification showing a summary of ongoing HTTP activity and Throwables. Tapping on the notification launches the full Chucker UI. Apps can optionally suppress the notification, and launch the Chucker UI directly from within their own interface.

HTTP Calls Throwables
Chucker HTTP transactions Chucker errors

Getting Started 👣

Chucker is distributed through Maven Central. To use it you need to add the following Gradle dependency to your build.gradle file of you android app module (NOT the root file).

Please note that you should add both the library and the the library-no-op variant to isolate Chucker from release builds as follows:

dependencies {
  debugImplementation "com.github.chuckerteam.chucker:library:3.2.0"
  releaseImplementation "com.github.chuckerteam.chucker:library-no-op:3.2.0"

To start using Chucker, just plug it a new ChuckerInterceptor to your OkHttp Client Builder:

val client = OkHttpClient.Builder()

That's it! 🎉 Chucker will now record all HTTP interactions made by your OkHttp client.

Historically, Chucker was distributed through JitPack. You can find older version of Chucker here: JitPack.

Features 🧰

Don't forget to check the changelog to have a look at all the changes in the latest version of Chucker.

  • Compatible with OkHTTP 4
  • API >= 16 compatible
  • Easy to integrate (just 2 gradle implementation lines).
  • Works out of the box, no customization needed.
  • Empty release artifact 🧼 (no traces of Chucker in your final APK).
  • Support for body text search with highlighting 🕵️‍♂️
  • Support for showing images in HTTP Responses 🖼

Multi-Window 🚪

The main Chucker activity is launched in its own task, allowing it to be displayed alongside the host app UI using Android 7.x multi-window support.


Configure 🎨

You can customize chucker providing an instance of a ChuckerCollector:

// Create the Collector
val chuckerCollector = ChuckerCollector(
        context = this,
        // Toggles visibility of the push notification
        showNotification = true,
        // Allows to customize the retention period of collected data
        retentionPeriod = RetentionManager.Period.ONE_HOUR

// Create the Interceptor
val chuckerInterceptor = ChuckerInterceptor(
        context = this,
        // The previously created Collector
        collector = chuckerCollector,
        // The max body content length in bytes, after this responses will be truncated.
        maxContentLength = 250000L,
        // List of headers to replace with ** in the Chucker UI
        headersToRedact = setOf("Auth-Token"))

// Don't forget to plug the ChuckerInterceptor inside the OkHttpClient
val client = OkHttpClient.Builder()

Throwables (Deprected) ☄️

Warning: This functionality will be unavailable in 4.x release. Details in this issue

Chucker can also collect and display Throwables of your application. To inform Chucker that a Throwable was fired you need to call the onError method of the ChuckerCollector (you need to retain an instance of your collector):

try {
    // Do something risky
} catch (IOException exception) {
    chuckerCollector.onError("TAG", exception)

Redact-Header 👮‍♂️

Warning The data generated and stored when using Chucker may contain sensitive information such as Authorization or Cookie headers, and the contents of request and response bodies.

It is intended for use during development, and not in release builds or other production deployments.

You can redact headers that contain sensitive information by calling redactHeader(String) on the ChuckerInterceptor.

interceptor.redactHeader("Auth-Token", "User-Session");

Migrating 🚗

If you're migrating from Chuck to Chucker, please refer to this migration guide.

If you're migrating from Chucker v2.0 to v3.0, please expect multiple breaking changes. You can find documentation on how to update your code on this other migration guide.

Snapshots 📦

Development of Chucker happens in the develop branch. Every push to develop will trigger a publishing of a SNAPSHOT artifact for the upcoming version. You can get those snapshots artifacts directly from Sonatype with:

repositories {
    maven { url "" }
dependencies {
  debugImplementation "com.github.chuckerteam.chucker:library:3.3.0-SNAPSHOT"
  releaseImplementation "com.github.chuckerteam.chucker:library-no-op:3.3.0-SNAPSHOT"

Moreover, you can still use JitPack as it builds every branch. So the top of develop is available here:

repositories {
    maven { url "" }
dependencies {
  debugImplementation "com.github.chuckerteam.chucker:library:develop-SNAPSHOT"
  releaseImplementation "com.github.chuckerteam.chucker:library-no-op:develop-SNAPSHOT"

⚠️ Please note that the latest snapshot might be unstable. Use it at your own risk ⚠️

If you're looking for the latest stable version, you can always find it on the top of the release branch.


  • Why are some of my request headers missing?
  • Why are retries and redirects not being captured discretely?
  • Why are my encoded request/response bodies not appearing as plain text?

Please refer to this section of the OkHttp documentation. You can choose to use Chucker as either an application or network interceptor, depending on your requirements.

Contributing 🤝

We're offering support for Chucker on the #chucker channel on Come and join the conversation over there.

We're looking for contributors! Don't be shy. 😁 Feel free to open issues/pull requests to help us improve this project.

  • When reporting a new Issue, make sure to attach Screenshots, Videos or GIFs of the problem you are reporting.
  • When submitting a new PR, make sure tests are all green. Write new tests if necessary.

Short TODO List for new contributors:

Acknowledgments 🌸


Chucker is currently developed and maintained by the ChuckerTeam. When submitting a new PR, please ping one of:


Big thanks to our contributors ❤️


Chucker uses the following open source libraries:

  • OkHttp - Copyright Square, Inc.
  • Gson - Copyright Google Inc.
  • Room - Copyright Google Inc.

License 📄

    Copyright (C) 2018-2020 Chucker Team.
    Copyright (C) 2017 Jeff Gilfelt.

    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

    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.
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