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.

34 tools available

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.

Audio Tools

Developer Tools 6

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.

Developer Tools › Utilities
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.

Developer Tools › Testing & Debugging
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.

Developer Tools › Testing & 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.

Developer Tools › Testing & Debugging
Password Strength Tester

Test password strength with real-time analysis. Check security, entropy, crack time, and get recommendations. Generate cryptographically secure passwords instantly.

Developer Tools › Utilities
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.

Developer Tools › Testing & Debugging

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.

File Tools

Hardware Tools 24

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.

Hardware Tools › Sensors
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.

Hardware Tools › Diagnostics
Compass Calibration

Verify your phone compass by comparing magnetometer and gyroscope headings. Follow guided motions, capture a true north reference, and measure deviation instantly.

Hardware Tools › Sensors
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.

Hardware Tools › Sensors
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.

Hardware Tools › Performance
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.

Hardware Tools › Performance
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.

Hardware Tools › Sensors
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.

Hardware Tools › Diagnostics
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.

Hardware Tools › Diagnostics
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.

Hardware Tools › Sensors
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.

Hardware Tools › Performance
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.

Hardware Tools › Sensors
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.

Hardware Tools › Diagnostics
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.

Hardware Tools › Performance
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.

Hardware Tools › Sensors
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.

Hardware Tools › Sensors
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.

Hardware Tools › Diagnostics
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.

Hardware Tools › Connectivity
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.

Hardware Tools › Sensors
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.

Hardware Tools › Diagnostics
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).

Hardware Tools › Connectivity
Keyboard Tester

Visual keyboard tester for QWERTY, AZERTY, Windows, and Mac layouts. Highlight pressed keys, monitor stuck switches, and validate shortcuts in real time.

Hardware Tools › Diagnostics
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.

Hardware Tools › Connectivity
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.

Hardware Tools › Connectivity

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.

PDF Tools

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.

Text Tools