Python 2 Online Compiler

Python 2 reached end of life on January 1, 2020. No more security patches, no more updates. And yet, here we are -- people still need to run Python 2 code.

That's not because anyone is starting new projects in Python 2. It's because legacy code exists. Migration projects exist. And sometimes you need to verify how something behaves in Python 2 before porting it to Python 3.

The problem with running Python 2 locally

Most systems ship with Python 3 now, and many have removed Python 2 entirely. Installing Python 2 in 2026 is an exercise in frustration -- you're hunting for archived builds, dealing with package managers that have dropped support, and potentially messing up your system Python setup.

A Python 2 online compiler sidesteps all of that. Open a browser, write Python 2 code, run it.

Python 2 vs Python 3: the gotchas

If you're migrating code, these are the differences that bite you most often. A Python 2 online compiler is perfect for testing these edge cases:

# Print is a statement in Python 2, not a function
print "Hello from Python 2"

# raw_input instead of input
# (in an online compiler, you can test the syntax even without stdin)
name = "World"
print "Hello, %s!" % name

# Integer division behaves differently
result = 7 / 2
print "7 / 2 =", result   # Prints 3, not 3.5

# xrange exists (it's range in Python 3)
for i in xrange(5):
    print i,
print

# String formatting with % operator (common in legacy code)
data = {"count": 42, "label": "items"}
print "Found %(count)d %(label)s" % data

# Unicode handling is different
text = u"caf\u00e9"
print type(text)
print text

Paste that into OneCompiler's Python 2 editor and you'll see it run with Python 2 semantics -- integer division returns 3, print works without parentheses, and xrange doesn't throw a NameError.

Who still needs Python 2?

More people than you'd think:

Teams migrating legacy codebases. You need to understand the Python 2 behavior before you can port it correctly. Running both versions side by side catches subtle bugs.
Data scientists working with older notebooks or scripts that were never updated.
System administrators maintaining automation scripts on older infrastructure.
Students taking courses that still reference Python 2 materials (surprisingly common).
Anyone debugging a production issue in a system that hasn't been migrated yet.

Why OneCompiler for Python 2

Finding a working Python 2 environment is getting harder every year. OneCompiler keeps one running and accessible from any browser. That's the main value.

Beyond that:

No install, obviously. You're not going to install Python 2 on your machine in 2026. You just aren't.
Quick comparisons. Open Python 2 in one tab, Python 3 in another. Test the same snippet in both. See exactly where it breaks.
Share links. When you're pair-debugging a migration issue, send your teammate a link to the exact code. They don't need Python 2 installed either.

The compiler won't help you write new Python 2 code (please don't). But for understanding, testing, and migrating existing Python 2 code, it's the fastest path from question to answer.

Start here: Python 2 Online Compiler on OneCompiler