JSON Beginner Tutorial | How to validate JSON
JSON Beginner Tutorial | How to validate JSON
How to check your JSON is valid
How to find errors | Demo
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Content
1.339 -> Hello and welcome to this session I am Raghav
And in this session, We are going to go very
7.21 -> basic step by step and we will learn how we
can check that our JSON is valid or how we
13.41 -> can find any errors in the syntax or any issues
with our JSON message or the JSON file We
20.27 -> will see a very quick demo on how you can
use different tools online and find issues
25.869 -> with your Json message or your JSON file.
in the last Session, we had created this file
32.48 -> demo dot Json and here you can see this is
the data in this file So we created these
39.34 -> arrays and objects So we have a user's array
which has all these objects, and then we had
45.07 -> subjects array and then we have all these
data added.
48.8 -> So just in case, you have not watched the
last session you can go and see that if you
54.17 -> do not have your Json ready or if you have
any JSON file or any Json message you can
59.52 -> Let us say I want to just check that This
Json is correct And there are no issues So
66.939 -> for that I will go to Google and search for
how to validate JSON and here you can see
74.31 -> I have got a lot of online tools available.
76.82 -> There is Json lint Let me go here and I will
also check for this Json validator and free
86.509 -> for matter and let me check this one as well
And then this we have from code beautify This
93.149 -> will help us to beautify our Json So these
tools will also help you to beautify your
98.729 -> Json or correct the formatting So now let
me show you one by one I will copy the entire
105.859 -> thing from here and I will go to this first
tool which is JSON lint now in the description
112.569 -> or the notes of this video I will also provide
all these links show so you can always check
118.069 -> the notes and get all these links from Here
I am pasting my entire Json here And then
125.029 -> I will click on this button validate Json
and here you can see there is some issue So
131.849 -> here it says there is some error on line 22
there is a parsing error So if I go to line
138.319 -> number 22, and yes, you can see this is the
subjects array and here if you see after this
144.599 -> first object I did not give a comma and that
is why there is this issue So I should give
150.22 -> a comma here and I will again say validate
Json and now it is saying this is a valid
155.209 -> Json So this is the first thing let us see
some more tools and you can then compare which
160.7 -> is better I will go to this Json schema validator
And again, I will copy my Json and paste it
168.9 -> here and then you can see So this is for schema
They should be a schema here Now I will tell
178.049 -> you about schema later So this we do not need
as of now because we do not have a Json schema
182.939 -> We directly have a Json message And yes, this
is the Json validator I will again copy my
189.68 -> Json and say validate Json here and let us
see the output So in this case again, we are
198.73 -> getting the issue So it says the Json input
is not valid in JavaScript missing a ] after
207.17 -> the list at line 29 So it says at line number
29, we have some issue but this is not very
216.65 -> good and it is does not give us direct information
and does not also gives us the direct position
224.92 -> like we could get here So this is not very
good or if I compare with the earlier one.
231.159 -> This is not very intuitive for me Let me go
to the JSON formatter and validator I will
238.06 -> again paste my Json message and click on the
process and let us see the output here and
245.349 -> here you can see this is much better.
247.569 -> It is saying that expecting comma or a closing
square bracket and not this at this particular
255.799 -> line So now here if I click on this you can
also see it is highlighting this so did you
262.23 -> see it highlighted this so when I click here
It is highlighting this here It is highlighting
268.729 -> this here This is very intuitive It is actually
giving us the exact issue It is also showing
275.88 -> us what is expected and is also highlighting
exactly at what position we need to put this
283.11 -> comma or a ] so here this is much better and
if I just go and give a comma here and now
293.46 -> I will say process and this time you can see
this is a this is- this is a valid Json So
299.979 -> this is much better then if I go to this Json
validator and again, I will paste my Json
306.72 -> and I will say validate Json and here again,
you can see it is giving us this issue which
311.389 -> is a parse error and also it is giving us
what is expected And also giving us the position
317.15 -> So this is also better until now I have found
this Json format and validator the best until
323.94 -> now you can also beautify your Json So if
you search for Json for matter or Json beautifier,
331.55 -> let me search for Json beautifier So just
in case you create your Json without giving
340.43 -> all these spaces tabs and everything You can
always just copy your Json and go to some
346.479 -> Json format or beautify like this so you can
see there are so many tools online and you
354.039 -> just have to provide your Json message here
or Json text here So here I can give it like
363.08 -> this And here I can see beautify Json so there
is a parse error which we know that they should
372.6 -> be a comma here and now I will say beautify
Json and it shows us the this version and
380.19 -> if I go here again, I will add my Json and
say beautify again It is showing us this parsing
388.09 -> error I will give a comma here and see beautify
and you can see this is here and I can also
394.19 -> see a tree view here which will show us The
collapsed form and then you can expand it
400.56 -> like this.
401.56 -> So all the objects and arrays you will see
they are now shown in a beautiful tree view
407.69 -> and this can be very handy And this is how
you can validate your JSON and you can also
413.48 -> check there if there are any issues and you
can beautify your JSON in the next session
417.74 -> We will learn how you can work with Json paths
and how you can create a JSON path I hope
424.06 -> this was very useful for you I will meet you
in the next session Thank you for watching.
Source: https://www.youtube.com/watch?v=wdVqEHB9zXA
