About these tools
These tools are made by the team behind Koldflux, a production studio for creators. We built them for our own workflow first, then made them public.
Nothing you open here is uploaded
Every converter, cropper, compressor and counter on this site runs inside your browser. Video and audio are processed by a WebAssembly build of ffmpeg; images go through the browser’s own canvas; text never leaves the page at all. There is no upload step, which is why there is also no queue, no daily limit, no file retention policy and no “your file will be deleted in 24 hours” disclaimer - your file was never on our servers to delete.
The practical consequence: these tools also work with your network disconnected once the page has loaded, and batch processing is unlimited, because your own device is doing the work.
Why it is free
Because it costs us close to nothing. Server-side converters have to charge for volume - every file consumes their CPU. Ours consumes yours. We fund the tools by hoping some fraction of the people who find them useful will eventually try the paid product, and that is the entire business model behind them. No ads, no data resale, no watermarks, no account wall.
How the specification data is reviewed
We compare reference data against platform help pages and publishing documentation, keeping API, advertising and native upload requirements separate. Source coverage is incomplete; a review date does not certify every value. The latest review on the specs page is 12 September 2026.
Platforms change limits and may apply different rules by account and upload surface. Missing or inaccessible sources remain unresolved. Safe-zone overlays are approximate editing guides; this site does not currently provide device-by-device measurement evidence. Check important text and faces in the destination preview before publishing.
What we collect
These tool pages set no advertising cookies and run no advertising analytics. File contents, text you paste and conversion results are never transmitted. See the privacy policy for how the wider product handles account data.
Corrections
If a number here is wrong or out of date, that is worth telling us about - the value of a dated reference depends entirely on it actually being maintained.
The paid product is the same engineering applied end to end: recordings in, finished posts out.
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