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JS Obfuscator - lightweight JavaScript obfuscation in your browser

Lightly obfuscate JavaScript in the browser: strip comments, remove debugger/console calls, and optionally wrap strings with base64.

  • Runs locally
  • Category Developer & DevOps
  • Best for Formatting, validating, shrinking, or inspecting code-adjacent text.
Transparent obfuscation, not Terser or security - This tool removes easy-to-read surface area and can wrap ordinary strings, but it does not encrypt code, prove dead code, rename scopes, or protect secrets.
Safety limits
  • Identifier and property names are not renamed. Safe scope-aware mangling belongs in Terser, esbuild, SWC, or a build pipeline.
  • String wrapping skips template literals, regex literals, directive strings, object keys, and static import/export specifiers.
  • Console removal only drops standalone console.method(...) statements, so expression-level logging is left unchanged.
Options:
Input
Output
Obfuscated output appears here.

What this tool does

JS Obfuscator is a lightweight, transparent JavaScript obfuscation tool for snippets, widgets, bookmarklets, demos, and quick handoff scripts. It removes comments and excess whitespace with a JS-literal-aware tokenizer, optionally removes standalone console.* calls and debugger statements, and can wrap ordinary string literals behind a small base64 decode helper. The tokenizer treats quoted strings, template literals, regex literals, and comments as different token types, so `//` inside a string, `/* ... */` inside a regex, and multiline template text are not rewritten as comments. This is intentionally not Terser: it does not rename variables, mangle properties, eliminate dead code, fold constants, build source maps, or claim to secure secrets. Use it when you need a fast browser-only readability reduction before sharing a small script, not as a production build optimizer. Size stats and transform counts show exactly what changed. Everything runs locally in your browser; code is not uploaded.

Tool details

Input
Text + Numbers
The page exposes text boxes, numeric controls, file pickers, or structured inputs depending on the tool.
Output
Live result + Copy + Download
The result area focuses on usable output, with copy, download, or preview actions when supported.
Privacy
Browser-side processing
The main tool logic does not call an external API, so inputs normally stay in the current tab.
Save / share
No account required
Open the page and use it; whether results survive refresh depends on the tool.
Performance budget
Initial JS <= 32 KB
No WASM budget is declared, keeping the tool quick to open on mobile.
Best fit
Developer & DevOps · Developer
Category and role tags drive related tools, internal links, and quick fit checks.

How to use

  1. 1. Input

    Paste or drop your content into the tool panel.

  2. 2. Process

    Click the button. All processing is local in your browser.

  3. 3. Copy / Download

    Copy the result or download to disk in one click.

How JS Obfuscator fits into your work

Use it in the small gaps between coding, reviewing, debugging, and shipping.

Developer jobs

  • Formatting, validating, shrinking, or inspecting code-adjacent text.
  • Preparing snippets for documentation, tickets, commits, or handoff.
  • Checking a small payload quickly without switching tools.

Developer checks

  • Run irreversible transforms like minify or obfuscate on a copy.
  • Keep secrets out of pasted snippets unless the tool explicitly stays local.
  • Use your normal tests or linter before shipping transformed code.

Good next steps

These links move the current task into a more complete workflow.

  1. 1 JS Minifier Minify JavaScript — strip comments, whitespace, optional name shortening. 40-70% smaller. Open
  2. 2 Base64 Encoder & Decoder Encode or decode Base64 — text, files, and Data URLs. Runs entirely in your browser. Open
  3. 3 Regex Tester Test JavaScript regex live — match highlighting, group capture, replace preview, flag toggles — browser-only Open

Real-world use cases

  • Share a small widget without every debug line and comment

    Paste a standalone browser widget, strip comments and whitespace, remove console/debugger statements, and copy the output into a CMS, landing page, or demo.

  • Make demo strings less immediately readable

    Enable base64 string wrapping for small snippets where obvious labels, messages, or URLs should be less visible at first glance while keeping the transform easy to audit.

  • Prepare a bookmarklet or inline script quickly

    Use the compact output and size stats to squeeze a short script before placing it in an HTML page, bookmarklet, or tag-manager field.

Common pitfalls

  • Do not treat obfuscation as encryption; any client-side script can be inspected and reversed.

  • Do not expect variable-name mangling here; this tool intentionally leaves identifiers untouched.

  • Check output size when base64 wrapping is enabled because the decoder helper can make small snippets larger.

  • Test behavior after removing console calls if your code depends on console return values or side effects.

Privacy

JavaScript obfuscation runs entirely in the browser. Source code is not uploaded, but you should still avoid sharing copied output or URL state when the script contains secrets, private endpoints, or customer data.

FAQ

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Made by Toolora · 100% client-side · Updated 2026-06-13