The audio toolbox
Audio Tools
Convert, compress and trim audio files with private, browser-based processing.
9 tools — all running entirely in your browser. Nothing you load here ever leaves your device.
100% client-side — your audio never leaves your device
Editing and converting audio without installing software
Most everyday audio jobs are small: turning a voice memo into an MP3 that plays everywhere, trimming a ringtone, making a podcast file smaller for email, joining two recordings, or making a quiet clip louder. Installing a full audio editor for tasks like these is overkill, and uploading personal recordings to an online service is not always comfortable.
FlashFile’s audio tools run entirely in your browser using the Web Audio API and an MP3 encoder written in JavaScript. Your recordings are decoded, edited and saved on your own device and are never uploaded to a server.
Common uses
Converting formats
Switch between MP3, WAV and M4A so your audio plays on any device or meets an upload requirement.
Trimming and joining
Cut out silence or mistakes, make ringtones, and merge several clips into one file.
Adjusting sound
Change the volume, speed up or slow down playback, and add smooth fades.
Shrinking files
Compress MP3s for email, messaging apps and websites.
MP3, WAV and M4A in a nutshell
MP3 is a compressed, lossy format that plays on practically everything. WAV is uncompressed: perfect quality, but large files, and ideal for editing. M4A usually contains AAC audio, used by iPhones and Apple apps, and offers good quality at small sizes.
Why many tools export WAV
Editing tools such as the cutter, volume, speed and fade tools save the result as WAV so that no additional compression is added. If you need a smaller file afterwards, convert it with WAV to MP3.
Private by design
Your audio files are processed locally in your browser whenever supported. Files are not uploaded to our servers, not stored, and never sent to third-party APIs.