<s>
Pixelfed	B-Application
is	O
a	O
free	B-License
and	I-License
open-source	I-License
image	O
sharing	O
social	O
network	O
service	O
.	O
</s>
<s>
It	O
is	O
decentralized	O
,	O
therefore	O
user	O
data	O
is	O
not	O
stored	O
on	O
a	O
central	O
server	B-Application
,	O
unlike	O
other	O
platforms	O
.	O
</s>
<s>
Pixelfed	B-Application
uses	O
the	O
ActivityPub	B-Operating_System
protocol	B-Protocol
which	O
allows	O
users	O
to	O
interact	O
with	O
other	O
social	O
networks	O
within	O
the	O
protocol	B-Protocol
,	O
such	O
as	O
Mastodon	B-Application
,	O
PeerTube	B-Application
,	O
and	O
Friendica	B-Application
.	O
</s>
<s>
Using	O
this	O
protocol	B-Protocol
makes	O
Pixelfed	B-Application
a	O
part	O
of	O
the	O
Fediverse	B-Application
.	O
</s>
<s>
Thus	O
,	O
users	O
are	O
able	O
to	O
sign	O
up	O
on	O
any	O
server	B-Application
and	O
follow	O
others	O
on	O
the	O
other	O
instances	B-Application
.	O
</s>
<s>
Much	O
like	O
Mastodon	B-Application
,	O
Pixelfed	B-Application
implements	O
chronological	O
timelines	B-General_Concept
without	O
content	O
manipulation	O
algorithms	O
.	O
</s>
<s>
Pixelfed	B-Application
optionally	O
organizes	O
its	O
media	O
by	O
hashtags	O
,	O
geo-tagging	O
and	O
likes	O
based	O
on	O
each	O
server	B-Application
.	O
</s>
<s>
Like	O
several	O
other	O
social	O
platforms	O
,	O
Pixelfed	B-Application
allows	O
accounts	O
to	O
be	O
locked	O
,	O
when	O
followers	O
must	O
be	O
pre-approved	O
by	O
the	O
owner	O
.	O
</s>
<s>
The	O
server	B-Application
maintained	O
by	O
the	O
main	O
developer	O
of	O
Pixelfed	B-Application
requires	O
users	O
to	O
be	O
over	O
16	O
years	O
old	O
.	O
</s>
<s>
Restrictions	O
are	O
different	O
on	O
different	O
instances	B-Application
.	O
</s>
<s>
Pixelfed	B-Application
has	O
photo	O
sharing	O
features	O
similar	O
to	O
the	O
Meta	O
Platforms	O
owned	O
Instagram	B-Application
service	O
.	O
</s>
<s>
Users	O
can	O
post	O
photos	O
,	O
stories	O
(	O
beta	O
version	O
)	O
and	O
collections	O
(	O
beta	O
version	O
)	O
via	O
an	O
independent	O
,	O
distributed	O
and	O
federating	O
photo	O
community	O
in	O
the	O
form	O
of	O
connected	O
Pixelfed	B-Application
instances	B-Application
.	O
</s>
<s>
Any	O
posts	O
from	O
the	O
users	O
of	O
same	O
Pixelfed	B-Application
instance	O
will	O
appear	O
on	O
Local	O
Feed	O
while	O
posts	O
from	O
other	O
Fediverse	B-Application
instances	B-Application
will	O
be	O
available	O
on	O
Global	O
Feed	O
.	O
</s>
<s>
Pixelfed	B-Application
has	O
some	O
of	O
Mastodon	B-Application
's	I-Application
features	O
,	O
including	O
an	O
emphasis	O
on	O
content	O
discovery	O
and	O
content	O
warnings	O
.	O
</s>
<s>
Users	O
can	O
post	O
up	O
to	O
6	O
gigabytes	O
depending	O
on	O
the	O
instances	B-Application
currently	O
.	O
</s>
<s>
The	O
development	O
of	O
official	O
apps	O
for	O
both	O
Android	B-Application
and	O
iOS	B-Application
is	O
still	O
in	O
progress	O
.	O
</s>
<s>
The	O
most	O
popular	O
Pixelfed	B-Application
server	B-Application
is	O
pixelfed.social	O
with	O
54,200	O
users	O
.	O
</s>
<s>
The	O
next	O
popular	O
English-language	O
server	B-Application
,	O
shared.graphics	O
,	O
has	O
a	O
community	O
of	O
1,250	O
users	O
.	O
</s>
<s>
Pixelfed	B-Application
supports	O
two-factor	O
authentication	O
via	O
TOTP	B-Algorithm
mobile	O
apps	O
,	O
such	O
as	O
1Password	B-Operating_System
,	O
Authy	O
Authenticator	O
,	O
LastPass	B-Operating_System
Authenticator	I-Operating_System
,	O
Google	O
Authenticator	O
and	O
Microsoft	O
Authenticator	O
.	O
</s>
<s>
NLnet	O
argued	O
in	O
2020	O
that	O
the	O
tools	O
and	O
features	O
of	O
Pixelfed	B-Application
make	O
it	O
a	O
"	O
more	O
attractive	O
(	O
and	O
ethical	O
)	O
alternative	O
"	O
to	O
Instagram	B-Application
.	O
</s>
<s>
In	O
December	O
2022	O
,	O
John	O
Voorhees	O
wrote	O
a	O
detailed	O
review	O
of	O
using	O
Pixelfed	B-Application
on	O
iOS	B-Application
,	O
and	O
said	O
"	O
Pixelfed	B-Application
is	O
sort	O
of	O
like	O
a	O
decentralized	O
version	O
of	O
Instagram	B-Application
that	O
has	O
adopted	O
the	O
ActivityPub	B-Operating_System
protocol.	O
"	O
</s>
<s>
In	O
February	O
2023	O
,	O
in	O
a	O
detailed	O
review	O
of	O
whether	O
to	O
leave	O
Facebook	O
,	O
Twitter	O
and	O
Instagram	B-Application
for	O
the	O
metaverse	O
,	O
Andrew	O
C	O
.	O
Oliver	O
,	O
Columnist	O
for	O
InfoWorld	O
wrote	O
,	O
"	O
Mastodon	B-Application
and	O
Pixelfed	B-Application
feel	O
safer	O
than	O
their	O
non-federated	O
counterparts	O
"	O
and	O
said	O
Pixelfed	B-Application
is	O
the	O
fediverse	B-Application
answer	O
to	O
Instagram	B-Application
.	O
</s>
<s>
Charlie	O
Sorrel	O
of	O
Lifewire	O
said	O
Pixelfed	B-Application
shows	O
the	O
flexibility	O
of	O
Mastodon	B-Application
,	O
and	O
has	O
the	O
potential	O
to	O
be	O
much	O
better	O
than	O
Twitter	O
because	O
of	O
ActivityPub	B-Operating_System
.	O
</s>
<s>
Using	O
Pixelfed	B-Application
has	O
been	O
discussed	O
in	O
books	O
and	O
conference	O
proceedings	O
.	O
</s>
