Inspect an audio file as a waveform and spectrogram. Automatic checks highlight possible clipping, clicks or pops, 50/60 Hz hum, and elevated broadband noise.
Drop an audio file here, or click to choose a file
Click or use the arrow keys to seek. Red marks show clipping candidates; orange marks show possible clicks or pops.
Detections are estimates based on signal patterns. Music transients, intentional distortion, and sparse recordings can resemble faults, so confirm candidates by listening.
Time runs from left to right, while frequency rises from the bottom of the spectrogram. Brighter colors mean more energy at that time and frequency. Use the waveform for level changes and exact transients, then use the spectrogram to see whether a sound is narrow-band, harmonic, or spread across many frequencies.
A thin horizontal line often indicates a steady tone or electrical whine. Repeating lines at 50 Hz or 60 Hz and their multiples can indicate mains hum. Broadband hiss fills a wider frequency area, clipping produces flattened waveform peaks, and a click or pop appears as a short vertical burst across many frequencies.
Peak level and clipping use decoded sample values. The noise floor is estimated from quieter analysis frames, spectral flatness helps distinguish noise-like energy from tones, and hum checks compare 50 Hz and 60 Hz harmonics with nearby frequencies. These measurements are practical indicators rather than laboratory-calibrated SNR or acoustic noise readings.
Format and beautify Java, Python, JavaScript, JSON, HTML and more; adjust indentation, spacing and line breaks.
Trim, join or split recordings, remove silence or noise, and adjust volume, speed, pitch or channels.
Open and edit CSV or Excel sheets, format tabular text, and convert CSV to Excel or SQL.
Write and preview Markdown, render Mermaid diagrams, and convert Markdown, HTML and tables between formats.
Compare passages, count words and keywords, sort or replace lines, and view DOCX text.
Look up Chinese meanings, synonyms and antonyms, or find IPA pronunciations in multiple languages.
Convert between MP3, WAV, FLAC and more, play audio or raw PCM, and inspect or edit audio metadata.
Inspect, compare and validate JSON; test JSONPath expressions, or convert data to CSV, YAML and XML.
Transcribe audio to text, generate speech from text, or record your voice in the browser.
Convert and compress video, trim or join clips, resize frames, and extract audio.
Play local or streaming video, record your screen or camera, and use your camera as an online mirror.
Compress or merge PDFs, split and rearrange pages, convert pages to images, and view or compare documents.
Convert image formats, resize or crop photos, compress files, compare pictures, and extract text with OCR.
Capture and beautify screenshots, turn text into images or GIFs, draw on a whiteboard, and create word clouds or favicons.
Edit SRT or VTT captions with a video preview, shift timing, convert formats, and manage subtitle tracks.
Open ZIP, 7Z, RAR or TAR files, extract selected contents, and create new archives with optional ZIP/7Z passwords.
Encode and decode Base64 or Base32, escape URLs, HTML and Unicode text, and inspect JWT contents.
Convert number bases and values between binary, decimal and hex; turn numbers into words or text into binary.
Work out percentages and fractions, summarize statistics, and calculate grades, discounts or aspect ratios.
Show an online clock, run a countdown or stopwatch, and calculate dates, ages or time-zone differences.
Check your IP and IPv6 connection, inspect HTTP requests or HAR files, and calculate CIDR address ranges.
Convert length, weight, temperature, data storage and other units.
Convert HEX, RGB and HSL values, extract colors from an image, check contrast, or test your display with solid colors.
Generate and scan QR codes or barcodes, including QR codes for links and Wi-Fi networks.
Generate hashes, UUIDs and passwords, test regular expressions, create URL slugs and check file permissions.
Check screen resolution and refresh rate, measure with a screen ruler, test keys, or read from a teleprompter.
2048, Minesweeper, Sudoku, Gomoku, Tank Battle