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Look up domain registration details over the WHOIS protocol — registrar, dates, nameservers and the status codes that matter.
Resolve a domain or IP to its network details — addresses, hosting provider, network owner and approximate location.
Convert Markdown to clean HTML with GitHub-flavoured tables, task lists and fenced code blocks, plus a live preview.
Calculate sample or population standard deviation with the variance, mean, standard error and coefficient of variation shown alongside.
Join up to ten audio files into one track in your browser. Hard cuts, timed gaps, crossfades and automatic level matching between tracks.
Generate memorable passphrases from random words — the diceware approach, with the real entropy shown for the number of words you pick.
Change a video's dimensions in your browser. Presets for 1080p, 720p and 4K, plus exact sizes for YouTube, Reels, TikTok, Instagram and LinkedIn.
Convert audio to and from MP3, WAV, M4A, AAC, OGG, Opus and FLAC. Batch up to ten files, with full control over bitrate, sample rate and bit depth.
Transcribe audio to editable text with OpenAI's Whisper running inside your browser. Timestamps, paragraphs, and export to TXT, SRT, VTT or CSV. No audio is uploaded.
Read text aloud with your device's own voices, or generate a downloadable MP3 with a neural voice model running in your browser. Free, unlimited, no sign-up.
Edit ID3 tags, artwork and album details on MP3, M4A and FLAC files without re-encoding. Bulk-tag a whole album, with automatic track numbering.
Make a quiet recording louder. Measures the file first with real peak and LUFS analysis, then lifts it by an exact amount with a limiter to stop clipping.
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