Audio Format Converter
Convert any audio file into MP3, WAV, FLAC, M4A, OGG, Opus or AAC while keeping full control of bitrate, sample rate, channel count and bit depth.
AudioOpen tool
Tool index
All 72 Ajee Convert Tools
Fast, Simple & Powerful Online Media Tools. Search the list or filter by category — every page states exactly what it does, which formats it accepts, and which operations a browser cannot perform.
No tool matches that search. Try a shorter term such as “audio”, “image” or “video”.
MP3 Converter
Turn WAV, FLAC, M4A, OGG, Opus or the audio track of a video into a clean MP3 at any bitrate from 64 to 320 kbps.
AudioOpen tool
WAV Converter
Produce uncompressed PCM WAV files at 16, 24 or 32-bit float — the format every audio editor, sampler and video editor accepts without argument.
AudioOpen tool
M4A to MP3 Converter
Convert iTunes and iPhone M4A/AAC recordings into MP3 files that play on any device, at up to 320 kbps.
AudioOpen tool
FLAC to MP3 Converter
Bring lossless FLAC down to a portable MP3 while keeping the option to encode at the maximum 320 kbps.
AudioOpen tool
OGG to MP3 Converter
Convert Ogg Vorbis and Opus files into MP3 so they play on hardware that never supported the Ogg container.
AudioOpen tool
320 kbps MP3 Converter
Encode at 320 kbps — the highest bitrate MPEG-1 Layer III supports — with a clear explanation of when that actually helps.
AudioOpen tool
Audio Bitrate Converter
Change an audio file's bitrate to shrink it — or raise it for a lossless source — with the real size difference reported.
AudioOpen tool
Sample Rate Converter
Resample audio to any standard rate from 8 kHz to 96 kHz using the browser's offline rendering engine.
AudioOpen tool
Audio Compressor
Even out loud and quiet passages with a real dynamic-range compressor, then normalise the peak for consistent playback.
AudioOpen tool
Audio Cutter
Cut a precise section out of any audio file with a visual waveform guide, optional fades and sample-accurate start and end points.
AudioOpen tool
Audio Trimmer
Trim silence and unwanted material from the beginning and end of a recording, with the waveform in view the whole time.
AudioOpen tool
Audio Joiner
Merge several audio files into one continuous track, in the order you choose, with optional gaps and loudness matching.
AudioOpen tool
Volume Changer
Raise or lower the level of any audio file by an exact multiplier, with clipping protection and optional fades.
AudioOpen tool
Mono ↔ Stereo Converter
Convert between mono and stereo: fold a stereo file to a single channel, or spread a mono recording across two.
AudioOpen tool
Audio Metadata & ID3 Tag Editor
Read the existing ID3 tag on an MP3, then write a new one — with the audio stream copied byte-for-byte and never re-encoded.
AudioOpen tool
Video to MP3 Converter
Pull the audio out of a video file and save it as MP3 — no video editor, no upload, no quality surprises.
AudioOpen tool
Video to WAV Converter
Extract a video's audio as uncompressed WAV — the correct starting point for editing, restoration or re-mixing.
AudioOpen tool
Audio to Video Converter
Turn an audio file into a video with an animated waveform visualisation, rendered frame by frame in your browser.
VideoOpen tool
Video Format Converter
Convert video between MP4, WebM, MKV, MOV and AVI — or pull out an audio track or an animated GIF — without uploading a single byte.
VideoOpen tool
MP4 Converter
Convert almost any video file into MP4 with H.264 video and AAC audio: the combination that plays on phones, televisions and browsers.
VideoOpen tool
MOV to MP4 Converter
Turn QuickTime MOV files — including iPhone recordings and ProRes exports — into MP4 that plays anywhere.
VideoOpen tool
MKV to MP4 Converter
Convert Matroska (MKV) files to MP4 for devices that do not support the container, with a clear account of what happens to extra streams.
VideoOpen tool
WebM to MP4 Converter
Convert WebM files with VP8, VP9 or AV1 video into MP4 that older devices, editors and televisions can actually play.
VideoOpen tool
Video Compressor
Shrink a video file by real H.264 encoding, with the actual size saving measured and reported before you download.
VideoOpen tool
Video Resizer
Change a video's pixel dimensions by preset, by width, or by an exact width and height you specify.
VideoOpen tool
Video Cutter
Cut a clip out of a video by setting a start and end time, with a fast stream-copy mode and a frame-accurate re-encode mode.
VideoOpen tool
Video Trimmer
Trim the start and the end of a video so it begins and finishes exactly where the content does.
VideoOpen tool
Video Joiner
Merge several video clips into one continuous file, in the order you list them, with a fast or a safe merge mode.
VideoOpen tool
Video to GIF Converter
Turn a video clip into an animated GIF with a genuine LZW encoder and a proper 256-colour palette.
VideoOpen tool
GIF to Video Converter
Convert an animated GIF into a real video file — often a fraction of the size — using a GIF decoder written for this tool.
VideoOpen tool
Video Resolution Converter
Convert video between standard resolutions — 4K, 1080p, 720p, 480p, 360p — with the aspect ratio preserved.
VideoOpen tool
Video FPS Converter
Change a video's frame rate to match a delivery specification, or lower it to reduce the file size.
VideoOpen tool
Video Speed Changer
Speed a video up or slow it down from 0.25× to 4×, with correct audio handling either way.
VideoOpen tool
Video Subtitle Extractor
Inspect a video file for subtitle tracks and get a straight answer about what a browser can and cannot extract.
VideoOpen tool
Image Resizer
Resize any JPG, PNG or WebP image by width, exact dimensions, percentage or a maximum box, with the aspect ratio kept correct.
ImageOpen tool
Image Compressor
Reduce an image's file size with a quality slider and optional downscaling, and see the real saving before you download.
ImageOpen tool
JPG to PNG Converter
Convert JPEG images into lossless PNG files, with transparency support ready for further editing.
ImageOpen tool
PNG to JPG Converter
Convert PNG images to JPEG with control over the quality and an explicit background colour for any transparent areas.
ImageOpen tool
WebP Converter
Convert images to WebP for smaller files on the web, or turn WebP back into PNG and JPEG where support is needed.
ImageOpen tool
Image Cropper
Crop an image to a chosen aspect ratio with control over the inset and which edge the crop is anchored to.
ImageOpen tool
Font Converter
Repackage TTF and OTF fonts into the WOFF web format with real per-table zlib compression — and a clear account of what cannot be done in a browser.
FontsOpen tool
TTF to WOFF Converter
Turn a TrueType TTF file into a WOFF web font, cutting 30–50 percent of the size with identical rendering.
FontsOpen tool
TTF to OTF Converter Read limits
TrueType to OpenType conversion needs a font compiler. This page explains exactly why, and gives you the route that actually works.
FontsOpen tool
OTF to TTF Converter Read limits
OpenType to TrueType needs cubic-to-quadratic outline conversion. This page explains why that cannot happen in a browser and how to do it properly.
FontsOpen tool
WOFF to WOFF2 Converter Read limits
WOFF2 needs Brotli plus a glyph-stream transform, neither of which a browser exposes. Here is what to run instead.
FontsOpen tool
WOFF2 to WOFF Converter Read limits
WOFF2 is Brotli-compressed with a table transform, so a browser cannot expand it back. Here is the command that can.
FontsOpen tool
Font Metadata Checker
Read a font file's real internals: name table, version, designer, licence, glyph count, metrics, embedding rights and character coverage.
FontsOpen tool
Font Previewer
Load a font file and preview it with your own text, at any size, weight, letter spacing and line height.
FontsOpen tool
Font Tester
Test a font for the things that actually matter: measure width, ambiguous glyph pairs, accent coverage and character set size.
FontsOpen tool
Font Identifier Read limits
Identifying a font from a picture needs a fingerprint database. This page explains why, and gives you four methods that actually work.
FontsOpen tool
Font Pairing Generator
Generate heading and body typeface pairings with a reason for each, set at real sizes so you can judge them properly.
FontsOpen tool
Audio Waveform Generator
Generate a waveform image from any audio file, with a choice of colour scheme, bar resolution and transparent background.
AccessoriesOpen tool
Audio Spectrum Visualizer
Generate a spectrogram with real FFT analysis — useful both as artwork and as a diagnostic for spotting lossy encoding.
AccessoriesOpen tool
Music Cover & Album Art Resizer
Resize cover art to the exact square size each streaming platform requires, with a warning when the source is too small.
AccessoriesOpen tool
Video Thumbnail Maker
Capture still frames from a video at even intervals, and optionally build a single contact sheet of the whole timeline.
AccessoriesOpen tool
YouTube Thumbnail Resizer
Fit an image to the exact YouTube thumbnail size and stay inside the 2 MB upload limit, with the file size checked for you.
AccessoriesOpen tool
Video Aspect Ratio Calculator
Work out any video's aspect ratio, then find the matching dimensions or the largest crop for a different target ratio.
AccessoriesOpen tool
Audio Bitrate Calculator
Work out exactly how large an audio file will be at any bitrate, duration, sample rate, channel count and bit depth.
AccessoriesOpen tool
Video Bitrate Calculator
Estimate the bitrate a video needs at any resolution, frame rate and quality level, and see what that means in storage.
AccessoriesOpen tool
FPS Calculator
Convert between frame counts, durations and frame rates, with drop-frame warnings and delivery guidance.
AccessoriesOpen tool
Video File Size Calculator
Estimate a video's size from its bitrate and duration — or work out the bitrate you need to fit a target limit.
AccessoriesOpen tool
Audio File Size Calculator
Estimate an audio file's size at any bitrate, and see how many tracks fit on a CD or in a gigabyte.
AccessoriesOpen tool
Media Duration Calculator
Total up the duration and storage of a batch of files, with playback-speed and storage projections.
AccessoriesOpen tool
Audio Info Checker
Read everything about an audio file: container, codec, sample rate, bitrate, channels, duration and measured levels.
Media CheckerOpen tool
Video Info Checker
Read a video's container, codec, resolution, duration and bitrate — with a straight answer about frame rate.
Media CheckerOpen tool
Bitrate Checker
Check what bitrate an audio file really is, from both its codec header and its actual file size.
Media CheckerOpen tool
Sample Rate Checker
Check an audio file's real sample rate and understand the frequency ceiling it imposes.
Media CheckerOpen tool
Resolution Checker
Check an image's real dimensions, megapixels, aspect ratio, encoding and colour information.
Media CheckerOpen tool
FPS Checker
Check what a browser can determine about a video's timing, and get the exact command that reveals the real frame rate.
Media CheckerOpen tool
Codec Checker
Identify the real codec inside a file by parsing its container structure, not by trusting the file extension.
Media CheckerOpen tool
File Size & Duration Checker
Check a media file's exact size and duration, then see how long it would take to transfer on a typical connection.
Media CheckerOpen tool