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Obfuscator.io
What it is
Obfuscator.io transforms JavaScript into code that is harder to read, including custom bytecode run by an embedded JavaScript virtual machine. Its standard obfuscation runs in the browser, has no usage limits and is free; the playground says submitted code stays on the device. VM obfuscation adds defenses such as integrity checks, hook detection, breakpoint neutralization and environment fingerprinting. Developers can select functions for VM obfuscation using comments and a configuration mode. The service provides REST API and npm package access, and the API can be used from build runners such as GitHub Actions, GitLab CI and Jenkins. Teams can share presets and tokens and keep versions and presets consistent across builds. The Free plan is free, with a 25 MB lifetime VM quota and a 4 MB VM file limit. Pro costs $19 a month, Team $59 a month and Business $149 a month. The maker cautions that obfuscation is not encryption or a guarantee against reverse engineering; VM output may not work with all code or runtime environments and should be tested before production use.
For and against
For
- Unlimited standard obfuscation is free
- Offers REST API and npm package access
- Teams can share presets and service tokens
- Supports selecting individual functions for VM obfuscation
Against
- Free VM use has a 25 MB lifetime quota
- Free VM files are limited to 4 MB
- Obfuscation does not guarantee protection from reverse engineering
- VM output may not work with all code or environments
The verdict
Obfuscator.io offers free browser-based standard obfuscation alongside paid VM features and build integrations. Its own cautions matter: obfuscation is not encryption, and VM output needs testing before production use.
Who it suits
Obfuscator.io may suit JavaScript developers who want browser-based standard obfuscation or VM protections and build integrations. Teams may find its shared presets and service tokens useful for consistent builds.
Plans and prices
Free
25 MB lifetime VM quota · 4 MB VM file size limit · unlimited standard obfuscation
Read 29 Sep 2026 · obfuscator.io
Pro
100 MB/month VM quota · 30 MB/day · API access (REST + npm package) · up to 10 files per batch
Read 29 Sep 2026 · obfuscator.io
Team
500 MB/month shared VM quota · 150 MB/day per member · up to 5 members · 7 MB VM file size limit
Read 29 Sep 2026 · obfuscator.io
Business
2.5 GB/month shared VM quota · 600 MB/day per member · up to 15 members · 10 MB VM file size limit
Read 29 Sep 2026 · obfuscator.io
On the record
- Code targeting
- Users can select individual functions for VM obfuscation by marking them with a comment and configuring the target functions mode.obfuscator.io · read 29 Sep 2026
- Compatibility
- The output is actively supported and tested on evergreen desktop browsers and iOS 16 or later; older browser support is best effort down to ES2015 module support, with Internet Explorer out of scope.obfuscator.io · read 29 Sep 2026
- Integrations
- The service offers REST API and npm package access, and its API can be called from GitHub Actions, GitLab CI, Jenkins, or any runner with Node.obfuscator.io · read 29 Sep 2026
- Limitations
- VM obfuscation may not work correctly with all input code or runtime environments, and the terms require users to test obfuscated code before production use.obfuscator.io · read 29 Sep 2026
- Purpose
- Obfuscator.io transforms JavaScript into harder-to-read code, including custom bytecode that runs in an embedded JavaScript virtual machine.obfuscator.io · read 29 Sep 2026
- Security limit
- The maker cautions that frontend secrets can be extracted and says obfuscation is not encryption or a guarantee against reverse engineering.obfuscator.io · read 29 Sep 2026
- Source handling
- The site says it does not keep source code; VM and HTML obfuscation send source to its servers for processing and discard it, while uploads larger than 4.4 MB on Team and Business use temporary storage deleted after processing.obfuscator.io · read 29 Sep 2026
- Standard obfuscation
- Standard obfuscation runs in the browser, is always free with no limits, and the playground says submitted code never leaves the device.obfuscator.io · read 29 Sep 2026
- Support
- The site lists [email protected] as its support contact and includes priority support with Business.obfuscator.io · read 29 Sep 2026
- Supported inputs
- The documentation says to compile TypeScript and JSX and bundle applications before obfuscation, and the site supports HTML files through its HTML parsing option.obfuscator.io · read 29 Sep 2026
- Team workflow
- Teams can share presets and service tokens and enforce obfuscator versions and presets across members and builds.obfuscator.io · read 29 Sep 2026
- Usage metadata
- For abuse handling and usage analysis, the service says it retains a SHA-256 hash of each obfuscated output and selected settings for three months, but not the code or its content.obfuscator.io · read 29 Sep 2026
- Usage restriction
- The terms prohibit using the API to operate an obfuscation SaaS or online tool for third parties, or reselling or white-labeling the service.obfuscator.io · read 29 Sep 2026
- VM defenses
- VM obfuscation offers self defending and debug protection features, including integrity checks, hook detection, breakpoint neutralization, and environment fingerprinting.obfuscator.io · read 29 Sep 2026
