Audio File Size Calculator
Estimate MP3, AAC, M4A, OPUS, FLAC, or WAV storage needs before a long recording session.
Free Audio Tools
Free browser tools for audio files and recordings.
Estimate storage, calculate recording time, edit tags, convert formats, and check your setup before saving streaming audio offline.
Tool Library
Choose the job first, then open the right tool.
Audio tasks get confusing when calculators, editors, converters, and checkers all sit in one long grid. These groups match the way people usually work with recordings.
Start here Plan and capture audio 5 tools Clean up files Edit, clean, and fix listening comfort 13 tools Prepare files Convert, tag, split, and organize 9 tools Mix smarter Podcast and creator checks 3 tools See the audio Music analysis and visuals 5 tools
Start here
Plan and capture audio
Use these when you are preparing a recording, checking file details, or deciding how much space you need.
Recording Time Calculator
See how many hours of audio can fit on a drive, memory card, or folder at common audio bitrates.
Online Audio Recorder
Record microphone audio, system sound, or both in your browser, then export MP3, WAV, WebM, OGG, or M4A when supported.
Audio Metadata Viewer
View song tags, embedded cover art, duration, bitrate, channels, MIME type, and file size without uploading.
Recording Quality Checker
Before you trust a recording, check peak and RMS levels, clipping risk, silent sections, channels, and sample rate in one pass.
Clean up files
Edit, clean, and fix listening comfort
Trim rough edges, make quiet audio easier to hear, remove gaps, and fix common listening problems.
Online Audio Editor
Trim, fade, normalize, remove silence, preview the waveform, and export MP3 or WAV locally.
Audio Trimmer
Cut unwanted starts, endings, ads, silence, or accidental noise from local audio files.
Audio Fade-in/Fade-out Adder
Add smooth fades to harsh music, lecture, ringtone, or recording edits so starts and endings feel natural.
Audio Volume Normalizer
Raise quiet recordings or balance peak volume before saving a normalized MP3 or WAV copy.
Free Online Audio Volume Booster
Boost quiet audiobooks, podcasts, lectures, or voice recordings and smooth uneven speech volume locally.
Basic Background Noise Reducer
Reduce steady hiss, hum, and background noise from old tapes, phone recordings, or family audio files.
Stereo to Mono Converter
Combine left and right channels so one-ear listening still includes vocals, instruments, and the full mix.
Lopsided Audio Pan Balancer
Fix recordings that lean too far left or right so headphone and speaker listening feels more comfortable.
Silence Remover
Remove long silent gaps from speech, lecture, meeting, or radio recordings in your browser.
Audiobook Silence Trimmer
Cut long pauses and blank gaps from audiobooks, lectures, and spoken recordings for smoother listening.
Sleep Audio Jump-Scare Tamer
Reduce sudden loud spikes in sleep audio, audiobooks, ASMR, rain sounds, and bedtime music.
Audio Speed Changer - Pitch Preserved
Speed up slow audiobooks, lectures, and language lessons while keeping voices from turning sharp or squeaky.
Mouth Click Finder
Auto de-clickers can flatten natural voice tone, but scrubbing a long interview by hand for every click is exhausting. This scans your recording and points you to likely mouth clicks, lip smacks, and sharp transients so you decide what to fix.
Prepare files
Convert, tag, split, and organize
Change formats, update tags, combine clips, split long files, and make audio easier to store or play elsewhere.
Audio Metadata Editor
Open common audio files and edit player-visible song info, comments, lyrics, and cover artwork when the format can be safely saved in the browser.
Audio Compressor
Compress browser-supported audio files to smaller MP3 copies with bitrate and channel controls.
Online Audio Format Converter
Convert browser-supported audio files to MP3, WAV, AIFF, AU, OGG, WebM, or M4A when the browser encoder allows it.
Voice Note to MP3 Converter
Convert browser-supported WhatsApp, WeChat, phone recorder, OPUS, M4A, or voice memo audio to MP3.
Video to Audio Extractor
Extract audio from short local video clips without uploading the file to a server.
Audio Chapter Splitter
Split long recordings, lectures, audiobooks, or radio shows by pasted chapter timestamps.
Audio Merger
Join chapters, segmented recordings, lectures, or captured clips into one MP3 or WAV file.
Ringtone Maker for Android/iPhone
Cut a favorite chorus or classic song section into a ringtone-ready MP3 or supported iPhone M4R file.
Car USB MP3 Tag Fixer
Fix garbled song names on car stereos by rewriting MP3 title, artist, album, and filenames into car-friendly copies.
Mix smarter
Podcast and creator checks
Check multi-speaker sessions, sync drift, and voice-over music levels before editing gets messy.
Podcast Track Balance Checker
When guests join a podcast from different mics and one track comes in quiet while another clips, compare all speaker tracks for level mismatch, clipping risk, silence, and timing before you start editing.
Audio Drift Fix Calculator
Two devices recording the same event drift apart over a long session even when the starts line up. Calculate the stretch percentage, ppm drift, and corrected duration needed to bring them back into sync.
Audio Ducking Calculator
Drop in intro music or a backing bed and the voice gets buried. Plan the ducking depth, fade times, and safe voice-over targets so speech stays on top without the music lurching.
See the audio
Music analysis and visuals
Create waveforms, spectrograms, tempo estimates, key estimates, and simple waveform videos.
Audio Waveform Generator
Generate a downloadable PNG waveform from a local audio file for a blog post, video thumbnail, or quick visual check.
Audio Spectrogram Generator
Render a simple frequency heatmap PNG for quick audio inspection.
Audio Waveform Video Maker
Create a WebM video with an animated waveform and your original audio for social posts or podcast clips.
BPM Finder
Estimate song tempo locally for beat-heavy music and rhythmic recordings.
Audio Key Finder
Estimate the likely musical key of harmonic audio files in your browser.
Workflow Map
Use the tools as a recording workflow, not a random list.
Start with planning, capture a short sample, check whether the file is usable, clean the copy, then move to Cinch when the job needs long-session reliability or automatic music metadata.
Choose settings before a long session
Estimate storage and format needs before recording a lecture, radio show, browser stream, or music session.
Plan recording timeCapture a short test first
Use the online recorder for quick browser, tab, mic, or system-audio checks before committing to a longer take.
Open recorderConfirm the file is usable
Look for silence, clipping, low level, channel mismatch, and format details before you spend time editing.
Check qualityTrim, normalize, or convert the copy
Remove dead air, fix volume, convert format, or split chapters while keeping the original file untouched.
Trim audioAdd song info and cover art
Finish with title, artist, album, comments, and artwork so the file is easier to find in players and libraries.
Edit metadataUse Cinch for long recording workflows
Switch to the desktop recorder when you need long sessions, streaming-audio capture, auto splitting, recognition, artwork, and lyrics.
Download trial Article Materials
Turn tool results into better help articles.
Each free tool can support a real user problem: planning before capture, checking a failed file, cleaning a copy, or explaining why a desktop recorder is the better fit for repeated work.
Before a long recording
Use calculators and a short browser capture to turn vague planning questions into a concrete preflight checklist.
After a rough recording
Use checker and cleanup tools as evidence before deciding whether to trim, normalize, split, or re-record.
When one file needs structure
Use chapter splitting, naming, and metadata tools to turn a long capture into usable listening files.
When format or playback fails
Use conversion, file-size, and car USB tools to explain real playback fixes instead of generic format advice.
When metadata is the problem
Use viewer and editor results as concrete screenshots or examples for missing title, artist, cover art, or lyrics issues.
When voice needs cleanup
Use recording checks, trimming, noise reduction, click review, silence removal, and normalization in the right order.
When phone notes need MP3 cleanup
Convert one voice note first, trim dead air, normalize quiet speech, and keep useful file labels.
When a recording becomes a ringtone
Choose a clean hook, trim it, add subtle fades, export a ringtone copy, and test the phone format.
When audio needs a visual
Trim the useful section, check the clip, then generate a waveform image or simple waveform video.
When video contains the useful audio
Extract the track, check that it is complete, trim only the useful part, then convert or compress a copy.
When an audio file is too large to send
Inspect the file, trim waste, estimate a target size, compress a sharing copy, and test before sending.
When a recording is too quiet
Check whether the file is fixable, remove waste or steady noise first, then normalize and boost carefully.
When a podcast needs short clips
Check the source, trim one focused moment, level speech, smooth the edges, and add a waveform if needed.
When stereo leans left or right
Inspect the channels, rebalance stereo when space matters, or convert to mono for reliable speech playback.
When sleep audio has loud surprises
Find sudden peaks, trim rough sections, tame spikes, reduce steady noise, and keep the final copy calm.
When lectures need faster review
Check the recording, trim setup time, shorten safe silence, split topics, and create a study-speed copy.
When audiobook files need comfort edits
Split chapters, shorten distracting pauses, tame sudden peaks, normalize narration, and keep originals safe.
When music practice files need order
Inspect tags, estimate BPM and key, trim practice sections, make speed copies, and label each version.
When audio needs transcription
Check completeness, trim unrelated sections, clean steady noise, level speech, and label the transcript copy.
When audio becomes a social post
Trim one focused clip, level it, smooth the edges, create a waveform visual, and compress only the final export.
When an audio file needs diagnosis
Inspect metadata, check silence and clipping, create visual clues, and make test copies without overwriting originals.
When audio goes into a presentation
Trim the slide moment, level it for speakers, smooth the edges, convert only if needed, and test the deck.
When family recordings need archiving
Preserve originals, clean listening copies gently, split meaningful sections, and label people, dates, and stories.
When radio shows become one long file
Check the full recording, trim waste, split segments, shorten only true dead air, and tag the listening copies.
When language audio needs practice copies
Trim one useful phrase or lesson section, make slower copies, shorten only safe silence, and label the practice version.
When an interview needs a highlight
Check the source, cut one focused moment, review distracting clicks, smooth the edges, and create a shareable reference.
When event audio must play cleanly
Inspect the file, trim cue points, normalize playback level, add fades when needed, and keep a compatible backup copy.
When a meeting recording needs review
Check speech quality, trim setup time, shorten safe silence, split agenda sections, and label the review copy.
When support needs a short audio example
Inspect the file, cut a short problem clip, add a waveform clue, and compress only a copy for sharing.
When course lessons need audio cleanup
Trim false starts, split modules, remove distracting silence, normalize narration, and export clear lesson files.
When background music needs a clean loop
Trim one repeatable section, smooth rough edges, set a comfortable level, and export a playback copy.
When before-and-after audio must be fair
Compare the same section, keep the original safe, match listening level, add visual clues, and label changes.
When audio needs client review
Prepare a clear review copy with trimmed context, comfortable level, version labels, and smaller sharing files.
When video voiceover needs polish
Check narration, trim false starts, reduce distracting steady noise, normalize speech, and export a video-ready copy.
When webinar replay audio needs structure
Trim waiting time, split agenda sections, shorten safe dead air, normalize speakers, and prepare replay copies.
When field recordings need sorting
Keep originals, inspect takes, trim useful moments, clean only distracting noise, and label place or subject clearly.
When two recordings drift apart
Compare two device recordings, find shared cues, calculate drift, trim test clips, and prepare synced review copies.
When music covers the voiceover
Prepare narration, choose the music section, estimate ducking, smooth fades, and test speech clarity before mixing.
When podcast guests sound uneven
Compare guest tracks, find clipping or silence, trim obvious waste, review clicks, and level podcast review copies.
Why It Helps
Good free tools bring the right visitors.
People who search for audio file size, recording time, or format planning are already close to the problem Cinch solves: saving playable audio as useful offline files.
- Planning a playlist, radio show, lecture, webinar, or long browser-audio recording
- Choosing a practical export format before saving offline music files
- Estimating disk space for MP3, M4A, OPUS, WAV, or lossless archives
- Moving from quick browser calculations to a desktop recorder with tagging and cleanup