Is the AVI to FLV conversion free?

Yes. Atlas Convert is completely free, no account needed, no watermarks, no ads.

Are my files uploaded to a server?

Most conversions run entirely in your browser using WebAssembly (ffmpeg.wasm, fflate, canvas). Only when a conversion genuinely requires server-side software (for example PDF↔DOCX or WMV target) is the file sent to our backend, processed in an ephemeral temporary directory, and deleted within seconds.

What does FLV look like compared to AVI?

Atlas Convert preserves the content faithfully when converting from AVI to FLV, but the underlying capabilities of each format differ — for example, format-specific features such as transparency, animation, vector data, or document layout may behave differently in the output.

Convert AVI to FLV

Drop a AVI file below — Atlas Convert turns it into FLV in seconds. Free, no signup, and runs locally in your browser for the highest privacy.

Drop your file here

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Step 1

Drop or pick your AVI file.

Step 2

We detect the format and convert to FLV for you.

Step 3

Save the converted FLV file to your device.

About AVI to FLV

AVI and FLV are both common video formats. Atlas Convert handles the conversion using best-in-class open-source tools — running entirely in your browser whenever possible, falling back to our sandboxed backend only when a specific pair genuinely requires server-side processing.

•Files up to 50 MB are supported.
•Most conversions never leave your browser — your file stays private.
•Free, no account, no watermarks, no ads.