ABCDEFGHIJKLMNOPQRSTUVWXYZ
1
Using Google Sheets might work to check under 1000 pages, or more if can be done slowly to avoid Google’s Captcha filter.

First paste this script

function HTTPResponse( uri )
{
var response_code ;
try {
response_code = UrlFetchApp .fetch( uri ) .getResponseCode() .toString() ;
}
catch( error ) {
response_code = error .toString() .match( / returned code (\d\d\d)\./ )[1] ;
}
finally {
return responsine_code ;
}
}

To The Script Editor on the Status Code tab



------

The function's name is "HTTPResponse". To use the function, add an equal sign to the beginning of the formula and add the URL within the parentheses, for example =HTTPResponse(C2)
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100