Private browser tools · browser-local
Record your screen, create a QR code, work with text, or test your devices. Pick a tool below. No sign-up.
Work happens in the current browser. The route does not require an account or a server-side processing job.
Choose a task below. Each tool explains what to choose and what you get.
What it does
Browser compatibility
A modern JavaScript-enabled browser; individual tools disclose any hardware, permission, or secure-context requirement before use.
Questions people ask
The deployed Labs workflows process their inputs in the current browser and do not provide a tool-content upload endpoint. See How Aftermath works for the reviewed network boundary and its limitations.
Voice Recorder can request microphone access; Camera & Microphone Test can request camera and microphone access; Screen Recorder can request a display source and optional microphone or camera access.
No. These Lab workflows run without an account. Some tools can optionally keep local history in the browser when storage is available.
Choose a browser utility for screen or voice recording, text formatting, QR generation, timers, or device checks. Open the focused tool to see the input it accepts and the result it can create. Recorders request browser permission before capture; text tools work on the content you enter. Results stay in this browser until you copy or download them, and device support varies.
| Need | Focused route | Why it matches |
|---|---|---|
| Generate or inspect QR content without automatic navigation. | Create a static QR code in your browser | The generator creates a reviewable static code from entered content. |
| Record the screen or a browser tab locally. | Free online screen recorder | The recorder owns explicit display-capture permission and local preview. |
| Test camera and microphone permission and session facts. | Test your camera, webcam, and microphone online | The device test reports preview, levels and negotiated capabilities. |
| Format, validate, and inspect JSON locally. | Format, validate, minify, and inspect JSON | The JSON route owns syntax, duplicate-key, formatting, and minification feedback. |
| Convert UTF-8 text or binary files to and from Base64. | Base64 encoder and decoder | The Base64 route separates text and binary modes and does not present encoding as encryption. |
| Record microphone audio with local preview and download. | Record microphone audio in your browser | The recorder owns explicit microphone permission and browser-supported recording output. |
| Use a stopwatch, countdown, or repeating focus timer. | Online stopwatch and countdown timer | The timing route exposes browser scheduling and background-throttling limits. |
| Practice typing, reaction, clicking, keyboard, or pointer tasks. | Performance & Device Lab | The performance hub keeps session observations separate from certification claims. |
Explore private browser tools for utilities, local capture, device checks, typing, click, and reaction tests. Work stays in the current browser.
Choose among browser-local utilities, capture tools, input tests, and device checks.
Next step: Choose a related route when the input, output, or required workflow is different.
Selected file bytes and entered browser data remain in the current browser session and are not sent to an Aftermath processing service. How local processing is verified.
Checks the displayed limits and reports or creates the local utility result or report described by the selected tool from text, a browser task, or an explicit device permission requested by the selected tool.
A local measurement or export does not guarantee acceptance by an external destination.
How it works · Privacy · Terms of use · Contact
