Free tools for video, audio and captions.

Keep a precise section of your recording and download an MP4.

Divide a recording into equal-length clips and download them together.

Fit your recording into a portrait, square or landscape frame.

Crop your video to a selected aspect ratio without stretching it.

Reduce a video's resolution and encoding size, then compare the download size.

Convert a supported video file into an H.264 MP4 with AAC audio.

Create a VP9 WebM file for browser playback.

Turn a short section of video into a looping GIF.

Rotate a sideways recording by 90, 180 or 270 degrees.

Mirror a recording horizontally or flip it vertically.

Remove a video's audio track and download the silent MP4.

Extract the audio from a recording as a downloadable MP3.

Extract uncompressed audio from a recording as a WAV file.

Speed up or slow down a video while keeping speech pitch steady.

Repeat a short video a chosen number of times in one MP4.

Join clips in upload order in a 1280 by 720 MP4, with padding to preserve their proportions.

Replace a video's soundtrack with your own audio file.

Place your PNG or JPEG logo in a corner of a video.

Put a short line of text on a recording and download the MP4.

Burn your reviewed SRT captions into a video.

Save a frame at a chosen timestamp as a PNG image.

See evenly spaced frames from a recording in one PNG.

Adjust brightness and contrast when a recording looks too dark or flat.

Convert a color recording into a monochrome MP4.

Apply a blur to the whole video before downloading it.

Cover a fixed rectangular area of a recording with a solid box.

Play a short video backwards, including its audio when present.

Fade a recording in and out at its start and end.

Export a recording at a chosen constant frame rate.

Inspect a file's duration, streams, frame size and codecs.

Combine an audio recording with a still image to make an MP4.

Turn your ordered images into a downloadable MP4 slideshow.

Turn an audio recording into a video with a moving waveform.

Keep a selected section of an audio file and download a WAV.

Convert a supported audio file into MP3, WAV or OGG.

Join recordings in upload order and download one WAV file.

Change an audio recording's speed while preserving voice pitch.

Repeat an audio recording a chosen number of times.

Adjust an audio file toward your chosen integrated loudness target.

Reduce steady background noise and listen to the result before using it.

Add short fades to soften the beginning and end of an audio clip.

Save a recording's waveform as a PNG image.

Generate a timestamped transcript and SRT captions to review and download.

Convert SRT or WebVTT captions into SRT, VTT or plain text on your device.

Edit individual caption text and timestamps, then export a subtitle file.

Move every caption forwards or backwards by an exact offset.

Retiming captions from one frame rate to another keeps their relative spacing.

Find overlapping captions, invalid times, long lines and fast reading speeds.

Combine two caption files with an optional offset for the second file.

Remove timestamps and numbering to download a readable transcript.

Translate caption text into a draft while retaining the original timestamps.

Record a chosen tab, window or screen and download the recording locally.

Record your camera and microphone, preview the take and download it.

Record your camera in a vertical canvas for short-form video.

Record your microphone, listen back and download the audio.

Record a selected screen with your camera overlaid in a corner.

Read a scrolling script while recording your camera and microphone.

Read a script while recording a vertical camera video.

Check your camera picture and microphone level before a recording.

Read your own script at an adjustable scrolling speed.

Change an image's dimensions while keeping its proportions.

Convert your image to PNG, JPEG or WebP without uploading it.

Export an image at a chosen quality and compare the resulting file size.

Add a headline to your image and download a 1280 by 720 thumbnail.

Center-crop an image into a portrait, square or landscape frame.

Blur an image on your device and download the PNG result.

Arrange your images in upload order in one downloadable contact sheet.

Extract a small palette from an image and download its hex colors.

Get several openings grounded in the topic and facts you provide.

Turn a topic and your supporting facts into a short spoken script.

Draft a structured opening, main points and ending from your brief.

Draft a title, description and on-screen hook from your video transcript.

Draft a caption and relevant hashtags from your transcript.

Draft a short caption and hook from the recording you describe.

Turn your recording's key point into a LinkedIn post draft.

Draft profile headlines from your actual role, audience and offer.

Tighten a draft post while keeping its original facts and point.

Draft an interview question sequence from the guest and topic you provide.

Draft chapters from a timestamped transcript without inventing times.

Draft a description from your transcript and the links you supply.

Turn an existing transcript into a list of clip and post ideas with supporting quotes.

Estimate file size from duration and combined video and audio bitrate.

Calculate a bitrate budget from a target file size and duration.

Find a proportional height or width for a chosen frame shape.

Convert a duration to frames and non-drop-frame timecode.

Estimate speaking time for your script at a chosen words-per-minute pace.

Estimate upload time from file size and your measured connection speed.

Calculate characters per second for one caption at your chosen duration.