UD5 Toolkit
Audio BPM Detector – Find Tempo of an Uploaded Track
Upload an MP3 or WAV file and get an estimated beats per minute using onset detection. DJs and musicians can quickly catalog track tempos.
Tag: Detector - Browser Feature Test
11+ toolsZero‑Width Character Detector - Online Find Hidden Unicode
Paste text and instantly see if it contains hidden zero‑width characters often used in steganography. Reveal invisible payloads.
Webcam Color Detector - Online Live Hue Picker
Point your camera at an object and see the dominant color in real time. Click to copy the hex. Fun tool for designers.
Offline Page Detector - Online See Cached Content
Check if the current page can be loaded offline by examining the service worker cache. Developer tool for PWAs.
What Font is Used on a Website - Online Detector
Enter a URL and extract the font stacks and web font URLs used on that page. Quick typography research.
Dominant Color Detector - Online Find Main Hue
Upload an image and instantly see its most dominant color as a hex swatch. Uses color quantization. Local.
Screen Resolution Detector - Online Viewport Size Checker
Detect your current screen resolution, viewport dimensions, and device pixel ratio. Useful for responsive design testing. No data collection.
Voice Pitch Detector - Online Live Mic Frequency
See the fundamental frequency (pitch) of your voice in real time using auto‑correlation. For singers and speech training. No upload.
Bias Detector Tool - Online Check Text for Subjective Language
Analyze text for subjective and emotionally charged words. Helps identify potential bias in writing. Purely heuristic, local operation.
File Encoding Checker - Online Detect Text File Charset
Upload a text file to detect its character encoding (UTF-8, ISO-8859-1, etc.) and BOM presence. Runs entirely in your browser.
File MIME Type & Magic Bytes Detector - Online
Drop a file to see its MIME type and the first few magic bytes (hex and ASCII). No upload, works instantly.