Media
Assemble a short podcast trailer from intro music, up to 5 highlight clips, a music bed under the clips, and a loudness target.
audio-podcast-trailer-builderMedia
Extract the background ambience/room tone from a fragment and generate a seamless loop of any target length.
audio-ambience-loop-generatorMedia
Detect breaths in speech and naturally crossfade to reduce, remove, or keep them.
audio-breath-control-editorMedia
Combine a timestamped transcript with the audio to mark filler words (um, uh, 嗯, 那个…) and optionally mute or remove them.
audio-filler-word-removal-mapFinance
Calculate the true Annual Percentage Rate (APR) of a loan when upfront fees are involved. The nominal interest rate sets the monthly payment, but fees reduce the net cash received, raising the effective APR. Uses Newton's method to solve the annuity present-value equation. Shows APR, nominal rate, monthly payment, and the APR premium.
apr-calculatorMedia
Compare integrated LUFS, true peak, LRA, stereo/mono, bitrate and sample rate against Apple Podcasts, Spotify, YouTube, ACX and broadcast targets.
audio-podcast-loudness-compliance-reportMedia
Apply a configurable podcast mastering chain: high-pass, denoise, de-ess, compression, EQ tilt, LUFS normalization, and true-peak limiting.
audio-podcast-mastering-chainFinance
Convert an amount between currencies using live exchange rates from a free, no-key API (open.er-api.com). Supports 160+ world currencies. Shows the converted amount, the exchange rate used, a comparison table against popular currencies, and the rate update timestamp.
currency-exchangeFinance
Project investment growth with initial principal plus monthly contributions and compound interest. Supports compounding frequency, inflation-adjusted real value, and yearly contribution escalation, with a yearly breakdown table and nominal vs real balance curves.
investment-calculatorMedia
Convert up to 20 uploaded images, or images inside a ZIP archive, into WebP files packaged as a ZIP
image-to-webp-batch-converterUtilities
Estimate how many buckets of interior paint you need from room dimensions, doors/windows, coats, paint coverage, and bucket size — rounded up to whole buckets, with optional primer and waste factor.
interior-paint-coverage-estimatorUtilities
Parse SMILES, detect the senior functional group, find the longest carbon chain, and emit a teaching-oriented IUPAC name with E/Z and R/S hints.
iupac-organic-naming-tool