SWF to SLN Converter
Extract SWF Flash audio as Asterisk PBX format online
Flash to PBX Audio
Rescue audio from discontinued SWF Flash files and repurpose it as Asterisk PBX prompts, hold music, or VoIP greetings.
No Local Tools
Neither Flash Player nor Asterisk CLI is needed. Our servers handle SWF extraction and SLN encoding — fully online.
Secure Handling
SWF uploads are deleted after conversion. SLN output is removed within 24 hours — your audio content remains private.
How to convert SWF to SLN
Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
Choose sln or any other format you need as a result (more than 200 formats supported)
Let the file convert and you can download your sln file right afterwards
About formats
Frequently Asked Questions
SLN is Asterisk PBX raw audio. Flash SWF files with narration or sound effects can become custom phone prompts and VoIP greetings.
No — our servers extract SWF audio without any Flash plugins. The conversion works even though Flash has been discontinued.
SLN is 8kHz, 16-bit signed integer, little-endian raw PCM — the native telephony audio format for Asterisk open-source PBX systems.
SLN at 8kHz provides standard telephone quality. Voice narration from SWF sounds clear — music and effects lose detail at this rate.
Batch upload multiple SWF files and convert them all to SLN. Build a library of phone prompts from archived Flash content.