swf‐version compiler option

When targeting a specific version of Adobe Flash Player or Adobe AIR, you may need to specify the swf-version compiler option when running the mxmlc or compc compiler executable. The following chart shows the relationships between Adobe AIR versions, Adobe Flash Player versions, and swf-version values.

AIR Version	Flash Version	SWF Version
51.0	N/A	51
50.0	N/A	50
33.1	N/A	44
32.0	32.0	43
31.0	31.0	42
30.0	30.0	41
29.0	29.0	40
28.0	28.0	39
27.0	27.0	38
26.0	26.0	37
25.0	25.0	36
24.0	24.0	35
23.0	23.0	34
22.0	22.0	33
21.0	21.0	32
20.0	20.0	31
19.0	19.0	30
18.0	18.0	29
17.0	17.0	28
16.0	16.0	27
15.0	15.0	26
14.0	14.0	25
13.0	13.0	24
4.0	12.0	23
3.9	11.9	22
3.8	11.8	21
3.7	11.7	20
3.6	11.6	19
3.5	11.5	18
3.4	11.4	17
3.3	11.3	16
3.2	11.2	15
3.1	11.1	14
3.0	11.0	13
2.7	10.3	12
2.6	10.2	11
1.5, 2.0	10.0, 10.1	10
N/A	9.0.115.0	9

Historical version information sourced from Adobe Developer Connection: Flash Player and Adobe AIR feature list.