Category
Utilities
Utilities cover device and viewport checks, user-agent reading, keyboard and mouse tests, barcodes, data URIs, MIME and file-signature lookup, and HTTP status codes. Each page reports the values it can actually read or generate.
20 tools in this category
Featured Utilities
All Utilities
Showing 20 tools
Keyboard Tester
See keys as they are pressed.
Utilities
Screen Resolution Checker
Show this device’s screen resolution.
Utilities
Aspect Ratio Calculator
Simplify ratios and solve missing sides.
Utilities
Barcode Generator
Generate a Code 39 barcode SVG.
Utilities
Battery Status Checker
Show battery level when the browser allows.
Utilities
Browser Information Checker
Show available browser and platform details.
Utilities
Corrupt File
Generate a corrupted test copy of a file.
Utilities
Data URI Generator
Create a data URI from text or a file.
Utilities
Device Pixel Ratio Checker
Read devicePixelRatio from this device.
Utilities
File Signature Checker
Inspect a file’s magic-number bytes.
Utilities
HTTP Status Code Lookup
Look up HTTP status codes.
Utilities
MIME Type Checker
Map extensions and files to MIME types.
Utilities
Mouse Tester
Inspect mouse buttons and movement.
Utilities
Online Status Checker
Show navigator.onLine and live changes.
Utilities
Random IP Generator
Generate synthetic IPv4 addresses for tests.
Utilities
Text to Speech
Speak text with built-in browser voices.
Utilities
URL Parser
Split a URL into its parts.
Utilities
User Agent Parser
Parse this browser’s user agent.
Utilities
Viewport Size Checker
Live viewport width and height.
Utilities
Webcam Test
Preview your webcam and capture a snapshot.
Utilities
Related categories
Explore neighboring Tool Base categories for related workflows.
Frequently Asked Questions
- Where do screen numbers come from?
- They are the values this browser reports for screen, viewport, and devicePixelRatio.
- Does the barcode tool create QR codes?
- The barcode tool encodes Code 39. Use the QR Code Generator for QR codes.
- Does file signature reading upload my file?
- The checker reads leading bytes in the page to compare known signatures.