Playback uses the shared length available after both start points.
Reduces the louder recording to the quieter level. This is an approximate whole-file comparison, not a loudness certification.
X is randomly selected as A or B for each trial. The identity of X stays hidden until you submit your answer. Results describe this listening session only.
Compare two recordings using aligned listening segments and immediate switching between A and B. Set a separate start point for each file to compare matching passages, and optionally reduce the louder recording to a similar average volume.
ABX mode randomly assigns A or B to X and records your answers across trials. The result reflects this session and is not a hearing assessment.
Use any two audio files your browser can play. Browser format support varies. Optional average-volume matching also requires the browser to decode both files; try WAV or MP3 if a file fails.
Yes. Each file plays at its original timing through the browser. The shared segment ends at the earliest selected end or file ending. Set separate start points to align content; the tool does not automatically align waveforms or change pitch.
It measures the decoded recordings’ average signal level and reduces the louder source to the quieter level. It does not amplify either recording, measure a certified loudness standard, or guarantee equal perceived loudness for every passage.
Each new trial randomly chooses whether X uses A or B. Listen and switch as needed, then choose X is A or X is B. The answer is revealed only after you submit, and the session score counts completed trials.
No. Results depend on the recordings, alignment, playback equipment, environment, and the number of trials. They are for comparing recordings in this session, not a hearing diagnosis or a scientific conclusion.
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