Comment Stripper — Remove Code Comments
Remove all comments from source code in JavaScript, Python, HTML, CSS, Shell, and Ruby with optional blank line cleanup.
How it works
- 1Paste or type your text in the input field
- 2Click "Strip Comments" — processing happens in your browser
- 3Copy the result or download as a text file
What to do next
About Comment Stripper
Comment Stripper is part of a collection of single-purpose developer utility tools. Remove all comments from source code in JavaScript, Python, HTML, CSS, Shell, and Ruby with optional blank line cleanup. Each tool is intentionally narrow — it does one thing well rather than offering many overlapping features — which makes the common path predictable and the result easy to verify before you download or copy it.
Anyone who works with developer utility on a casual basis — site reliability engineers triaging logs, backend developers inspecting requests, frontend developers prepping fixtures — finds Comment Stripper a quick way to get the result. The page loads in under a second, the controls are visible from a single screen, and the result downloads or copies in one click.
Comment Stripper is a static page plus a client-side engine. The browser does the work; there is no separate backend in the loop for the actual processing. That architecture is why the tool starts immediately, why it does not depend on the load on a remote service, and why running multiple jobs in a row does not slow it down.
From a technical standpoint, Comment Stripper is JavaScript and standard browser APIs running in your tab. The browser is the runtime; the page is the interface. Maximum input size: 0 MB per run.
Comment Stripper works well as a bookmarked utility you reach for when you need it. The first visit shows you what the tool does; the second is when you realise it is a low-friction option for the task and worth keeping in your tab list.
Comment Stripper is intentionally narrow in what it does, which makes it easy to slot into a longer workflow. Take its output, hand it to whichever next tool fits the job, and Comment Stripper stays out of your way until the next time you need it.
Comment Stripper returns the result as a download. If you are running multiple jobs, the output names will not collide as long as the input names differ. You can re-run with different settings as many times as you like; each run produces a fresh file with no caching trickery in between.
The architecture imposes only the limits the browser itself imposes. The published 0 MB ceiling is conservative; most modern devices comfortably handle inputs up to that size, and the cap exists so the tool degrades gracefully on phones and budget laptops rather than running out of memory.
Comment Stripper is honest about scope: it handles a single, well-defined developer utility step. Specialist edge-case work — uncommon formats, very large inputs, or pipelines that need scripting — is what dedicated desktop apps are for. This page handles the common case quickly.
Some context on why Comment Stripper exists in this form: modern File APIs, high-performance JavaScript engines, and well-maintained open-source libraries now make it possible to perform developer utility work entirely in the browser. Comment Stripper is built on top of that capability, which is why a single page can host the full pipeline.
Useful patterns when working with Comment Stripper: keep the input file open in another tab so you can compare against the result; give the output file a descriptive name when saving so you can find it later (the default name is sensible but generic); and treat each run as independent — the tool has no concept of "history", which means you cannot accidentally pollute one job with leftovers from another.
When something goes wrong, the cause is usually one of three things: a malformed input, a browser that is out of memory, or a corporate proxy that is interfering with the page's static assets. The first two are easy to diagnose; the third typically requires asking your IT team to allow standard browser APIs to load.
If you also use a command-line tool for comment stripper, Comment Stripper is a convenient alternative for the times you are on a different machine or helping someone who is not comfortable in a terminal. The output is a standard file in the format documented above.
Comment Stripper is one of many single-purpose tools in the catalog. Each is built around the same single-page model. Use this one, close the tab, and come back the next time you need the same job done. None of the tools require prior knowledge of the others — each page is self-contained.
How it works
- 1Open the Comment Stripper workspace above. The interface is a single page, so there is nothing to navigate.
- 2Add your developer input by dropping it onto the page or browsing for it.
- 3Adjust the options to match what you need. Sensible defaults cover the most common case, so you can usually skip this step.
- 4Click to start the job. The engine (standard browser APIs) processes the input in the page; you can watch the progress indicator until it completes.
- 5Save the output when it is ready.
- 6Repeat the process for additional inputs whenever you need to. The page stays loaded, so subsequent runs are quick.
Common use cases
- Convert between data formats while wiring up an integration using Comment Stripper.
- Generate boilerplate from a single specification line.
- Encode binary content for transport in a JSON body.
- Decode a token to confirm its claims during a debugging session.
- Compare two API responses to spot a regression.
- Generate a quick fixture without leaving the browser.
- Hash a string for a quick reproducibility check.
- Inspect a regex against a test string before committing it.
- Format a noisy log line into something a teammate can read.
FAQ
What languages are supported?
JavaScript/TypeScript/Java/C (// and /* */), Python (# and triple-quotes), HTML (<!-- -->), CSS (/* */), Shell/Bash (#), and Ruby (#).
Are inline comments removed?
Yes — inline comments (// after code, # after code) are removed while preserving the code before them.
Does it handle strings correctly?
The tool avoids removing comment-like text inside string literals for JavaScript-style languages.
Can I remove blank lines too?
Yes — enable the "Remove blank lines" option to clean up empty lines left after comment removal.
Will it break my code?
In rare cases, removing comments that contain special directives (like eslint-disable) may change behavior. Review the output.
Is my code private?
Yes — stripping runs entirely in your browser with no uploads.
Does Comment Stripper upload my file to a server?
Your file is processed inside your browser by standard browser APIs. The engine reads the file's bytes from your tab's memory, computes the result, and writes the result back into the tab. You can confirm what the page does by opening developer tools and watching the Network tab during a run — the requests you see are for the tool's static assets only.
How accessible is the Comment Stripper interface?
Comment Stripper uses native HTML controls wherever possible, which means keyboard navigation, focus rings, and screen-reader labels work the way the platform expects. The drop zone accepts files via the keyboard-accessible file picker as well as drag-and-drop, and result downloads use standard browser download flows. If you spot an accessibility gap, Favtoo treats it as a bug worth fixing.
Can I use Comment Stripper on iOS or Android?
Comment Stripper runs in any modern mobile browser — Safari, Chrome, Firefox and the in-app browsers in most messaging apps all support the underlying APIs. Performance depends on the device: a recent phone handles typical inputs nearly as fast as a laptop, while older devices may take a few seconds longer near the 0 MB ceiling. The interface lays out cleanly on small screens, so you do not need to pinch-zoom to see the controls.
Why does Comment Stripper feel slow on large inputs?
Most jobs finish in seconds. Speed scales with input size and with how many CPU cycles your browser tab has available — the engine runs in your browser, so it shares resources with whatever else you have open. For inputs near the 0 MB ceiling, expect anywhere from a few seconds to roughly a minute on a typical laptop. Closing other heavy tabs noticeably speeds things up.
Are there any hidden fees with Comment Stripper?
Comment Stripper is free to use. The processing runs in your browser, which keeps the per-user cost low enough that the tool can be offered openly. The download is the same file the engine produced — you can use it for as many runs as you need.
Why use Comment Stripper instead of a paid online tool?
Desktop apps usually have more advanced features but require installation, maintenance and (often) a licence. Paid online tools are convenient but route your file through their servers and gate downloads behind accounts. Comment Stripper sits in between: free, instant, and private, but intentionally narrow in scope. For one-off jobs and the common developer utility operations, it is usually the lowest-friction choice; for highly specialised work, a dedicated app is still the right answer.
Does Comment Stripper match what professional tools produce?
Comment Stripper is built on standard browser APIs, which is the same class of engine used by professional developer utility pipelines. For deterministic operations, the output is byte-identical to what an equivalent CLI run would produce; for operations involving a codec or a model, the result is well within the range of what comparable tools generate. If you have a specific reference output you need to match, run a small test job first to confirm the configuration produces what you expect.
Can Comment Stripper run inside a corporate firewall?
Comment Stripper is a static page running an open-source engine in your browser, so a typical corporate firewall does not get in the way as long as it allows JavaScript to load from Favtoo. For teams that need to host it themselves on an internal network, the underlying engine (standard browser APIs) is open-source and can be packaged into a private build with the same behaviour. Reach out via the Contact page if that is something you are exploring.