Tester Tools
Test inputs and endpoints with handy utilities: regex testers, HTTP/API checks and more—right in the browser for efficient development and debugging workflows.
Audio Tools 1
Audio Compare
Free online audio comparison tool. Compare two audio files using AB testing and statistical analysis. Measure RMS, peak, spectral centroid, rolloff and more. Perfect for audio engineers and producers.
Developer Tools 6
Testing & Debugging 4
XPath & CSS Selector Tester
Free online XPath and CSS selector tester tool. Test XPath expressions and CSS selectors on HTML. View matched elements with highlighting. Perfect for web scraping and automation testing.
WebSocket Tester
Free online WebSocket tester tool. Test WebSocket connections, send and receive messages in real-time. Monitor connection status and message history. Perfect for WebSocket development and debugging.
API Request Tester
Free online API request tester tool. Test REST APIs with GET, POST, PUT, DELETE methods. Send custom headers, request body, and view response data. Perfect for API development and testing.
Regex Tester
Free online regex tester tool. Test and debug regular expressions with real-time matching, syntax highlighting, capture groups, and flag support. Perfect for developers working with pattern matching and text processing.
Utilities 2
Robots.txt Tester
Free online robots.txt tester and validator. Test if URLs are allowed or blocked by robots.txt rules for different search engine bots. Perfect for SEO and web developers.
Password Strength Tester
Test password strength with real-time analysis. Check security, entropy, crack time, and get recommendations. Generate cryptographically secure passwords instantly.
File Tools 1
File Compare
Compare two files online and see differences. Free file comparison tool. Compare text files, binary files. Highlight changes, additions, deletions.
Hardware Tools 28
Connectivity 4
Network Quality
Test your network connection quality in real-time. Monitor network type, bandwidth, round-trip time (RTT), and connection speed using the Network Information API.
Bluetooth Signal Tester
Test Bluetooth Low Energy (BLE) devices in your browser. Scan, connect to nearby Bluetooth devices, read GATT services, and monitor signal strength (RSSI).
NFC Tester
Test NFC tags in your browser using Web NFC API. Read and write NDEF records (text, URI), lock tags to read-only mode. Works on Chrome Android with HTTPS only.
Speed Test
Test your internet connection speed instantly. Measure download speed, upload speed, ping, latency, and jitter. Professional speed test tool with real-time results.
Diagnostics 6
Battery Tester
Free online battery tester tool. Check battery health, charging status, battery level, and estimated time remaining. Monitor battery performance and get detailed statistics for your device.
Refresh Rate
Test your monitor's FPS and refresh rate in real-time. Measure display frequency, detect 60Hz, 120Hz, 144Hz, 240Hz monitors. Free FPS counter and Hz checker with accurate frame timing analysis.
Screen Tester
Free online screen tester tool. Check your monitor for dead pixels, stuck pixels, and display issues using RGB colors, grayscale, and test patterns. Fullscreen mode for accurate testing.
Webcam Tester
Free online webcam tester tool. Test your camera, check video quality, resolution, frame rate, and take snapshots. Perfect for testing webcams before video calls, streaming, or recording.
Audio Latency Tester
Test and measure audio output latency for music production, gaming, and streaming. Check audio delay and buffer size in your browser with real-time results.
Gamepad Tester
Test gamepad controllers (PS4, PS5, Xbox) for stuck buttons, analog drift, and trigger response. Real-time button mapping and deadzone detection.
Input Devices 5
Mouse Tester
Free online mouse tester tool. Test mouse buttons, clicks, double-clicks, scroll wheel, coordinates, and tracking. Check if your mouse is working properly with real-time button response, movement tracking, and event logging.
CPS Test
Test your clicking speed with our CPS (Clicks Per Second) tester. Perfect for gamers to measure mouse click speed in Minecraft, FPS games, and more.
Keyboard Tester
Visual keyboard tester for QWERTY, AZERTY, Windows, and Mac layouts. Highlight pressed keys, monitor stuck switches, and validate shortcuts in real time.
Reaction Time Test
Test your reaction time online free. Measure reflexes with visual and audio modes. Track stats, beat your best score. Average human reaction time is 250ms!
Typing Speed Test
Test your typing speed in words per minute (WPM) with real-time accuracy tracking. Practice typing, improve speed, and beat your personal records.
Performance 4
Storage Test
Free online storage read/write speed test tool. Test your disk performance with IndexedDB and localStorage. Measure storage speed, MB/s, operations per second, and latency for browser storage systems.
Memory Speed Test
Free online memory speed test tool. Test your RAM performance with array operations, object allocation, string manipulation, and typed arrays. Measure memory speed, operations per second, and RAM efficiency.
GPU Benchmark
Free online GPU benchmark tool. Test your graphics card performance with WebGL rendering, shader computations, particle simulations, and 3D graphics. Measure GPU speed, FPS, and rendering capabilities.
CPU Benchmark
Free online CPU benchmark tool. Test your processor performance with multi-threaded calculations, prime numbers, sorting algorithms, and mathematical operations. Measure CPU speed, cores performance, and compare results.
Sensors 9
Shake Detector
Detect strong shakes from your phone’s accelerometer. Adjust sensitivity, log shake intensity, and verify motion triggers for games or QA testing in seconds.
Compass Calibration
Verify your phone compass by comparing magnetometer and gyroscope headings. Follow guided motions, capture a true north reference, and measure deviation instantly.
Sound Level Meter
Measure sound levels and noise with live decibel meter. Monitor ambient noise, track dB levels, and get warnings for loud environments using your microphone.
Orientation Tester
Test your device orientation with live 3D phone visualization. Monitor tilt angles, rotation values, and device position in real-time with interactive display.
Ambient Light Tester
Test your device's ambient light sensor with live analog meter. Measure illuminance in lux, track brightness levels, and monitor light conditions in real-time.
Proximity Sensor Tester
Test your device's proximity sensor in real time. Start the sensor, see instant near or far status with animated feedback, and monitor distance readings in centimeters.
Gyroscope Tester
Test your device's gyroscope with live 3D visualization. Monitor alpha, beta, gamma rotation values and see orientation changes in real-time with interactive cube.
Magnetometer Tester
Measure ambient magnetic field strength in microteslas and view a live compass needle. Start the magnetometer, chart real-time readings, and calibrate heading instantly.
Accelerometer Tester
Test your device's accelerometer in real-time with live 3D visualization. Monitor X, Y, Z axis acceleration values and motion direction instantly.
PDF Tools 1
PDF Compare
Compare two PDF files online. Free PDF comparison tool to check differences in pages, text, size. Fast, secure, works in browser.
Text Tools 1
Text Difference
Compare two texts and find differences between them. A text diff checker highlights additions, deletions, and changes line by line, word by word, or character by character. Perfect for comparing code, documents, or any text content.
