Download and install

There are nightly binary builds available. Those builds are not always as stable as the release, but they contain numerous bugfixes and performance improvements.

We provide binaries for x86, ARM, and PPC Linux, Mac OS/X and Windows for:

  • the Python2.7 compatible release — PyPy2.7 v5.3.1 — (what's new in PyPy2.7? and release note for PyPy2.7-v5.3.1)
  • the Python3.3 compatible release — PyPy3.3 v5.2-alpha — (what's new in PyPy3.3?).
  • the Python2.7 Software Transactional Memory special release — PyPy-STM 2.5.1 (Linux x86-64 only)

“JIT Compiler” version

These binaries include a Just-in-Time compiler. They only work on x86 CPUs that have the SSE2 instruction set (most of them do, nowadays), or on x86-64 CPUs. They also contain stackless extensions, like greenlets.

Linux binaries and common distributions

Linux binaries are dynamically linked, as is usual, and thus might not be usable due to the sad story of linux binary compatibility. This means that Linux binaries are only usable on the distributions written next to them unless you're ready to hack your system by adding symlinks to the libraries it tries to open. There are better solutions:

Python2.7 compatible PyPy 5.3.1

Python 3.3.5 compatible PyPy3.3 v5.2

Warning: this is an alpha release supporting the Python 3.3 language. It's also known to be (sometimes much) slower than PyPy 2.

If your CPU is really, really old, it may be a x86-32 without SSE2. There is untested support for manually translating PyPy's JIT without SSE2 (--jit-backend=x86-without-sse2) but note that your machine is probably low-spec enough that running CPython on it is a better idea in the first place.

[1]: stating it again: the Linux binaries are provided for the distributions listed here. If your distribution is not exactly this one, it won't work, you will probably see: pypy: error while loading shared libraries: …. Unless you want to hack a lot, try out the portable Linux binaries.

PyPy-STM 2.5.1

This is a special version of PyPy! See the Software Transactional Memory (STM) documentation.

Other versions

The other versions of PyPy are:

  • The most up-to-date nightly binary builds with a JIT, if the official release is too old for what you want to do. There are versions for different libc on this site too.
  • Sandboxing: A special safe version. Read the docs about sandboxing. (It is also possible to translate a version that includes both sandboxing and the JIT compiler, although as the JIT is relatively complicated, this reduces a bit the level of confidence we can put in the result.) Note that the sandboxed binary needs a full pypy checkout to work. Consult the sandbox docs for details. (These are old, PyPy 1.8.)


All binary versions are packaged in a tar.bz2 or zip file. When uncompressed, they run in-place. For now you can uncompress them either somewhere in your home directory or, say, in /opt, and if you want, put a symlink from somewhere like /usr/local/bin/pypy to /path/to/pypy2-5.3.1/bin/pypy. Do not move or copy the executable pypy outside the tree – put a symlink to it, otherwise it will not find its libraries.

Installing more modules

The recommended way is to install pip, which is the standard package manager of Python. It works like it does on CPython. One practical difference, though, is that it usually comes pre-packaged for you when you get CPython from a place like your Linux distribution. In the case of PyPy (or CPython if you download it from, you need to get it separately, as explained in our FAQ.

Installing NumPy

NumPy is an exception to the rule that most packages work without changes. The “numpy” module needs to be installed from our own repository rather than from the official source.

If you have pip:

pypy -m pip install git+

Alternatively, the direct way:

git clone
cd numpy
pypy install

If you installed to a system directory, you need to also run this once:

sudo pypy -c 'import numpy'

Note that NumPy support is still a work-in-progress, many things do not work and those that do may not be any faster than NumPy on CPython. For further instructions see the pypy/numpy repository.

Building from source

  1. Get the source code. The following packages contain the source at the same revision as the above binaries:

    Or you can checkout the current trunk using Mercurial (the trunk usually works and is of course more up-to-date):

    hg clone

    The above command may take a long time to run and if it aborts, it is not resumable. You may prefer this way:

    hg clone -r null
    cd pypy
    hg unbundle
    hg unbundle
    hg unbundle
    hg unbundle
    hg unbundle
    hg unbundle
    hg unbundle
    hg unbundle
    hg unbundle
    hg pull
    hg update

    If needed, you can also download the bz2 files by other means. You can then replace the multiple unbundle commands above with a single hg unbundle pypy-bundle-*.bz2.

  2. Make sure you installed the dependencies. See the list here.

  3. Enter the goal directory:

    cd pypy/pypy/goal
  4. Run the rpython script. Here are the common combinations of options (works also with python instead of pypy; requires Python 2.x or PyPy 2):

    pypy ../../rpython/bin/rpython -Ojit targetpypystandalone           # get the JIT version
    pypy ../../rpython/bin/rpython -O2 targetpypystandalone             # get the no-jit version
    pypy ../../rpython/bin/rpython -O2 --sandbox targetpypystandalone   # get the sandbox version
  5. Enjoy Mandelbrot :-) It takes on the order of half an hour to finish the translation, and about 3GB of RAM on a 32-bit system and about 5GB on 64-bit systems. (Do not start a translation on a machine with insufficient RAM! It will just swap forever. See notes below in that case.)

  6. If you want to install this PyPy as root, please read the next section, Packaging.


  • It is recommended to use PyPy to do translations, instead of using CPython, because it is twice as fast. You should just start by downloading an official release of PyPy (with the JIT). If you really have to use CPython then note that we are talking about CPython 2.7 here, not CPython 3.x. (Older versions like 2.6 are out.)

  • On some 32-bit systems, the address space limit of 2 or 3 GB of RAM can be an issue. More generally you may be just a little bit low of RAM. First note that 2 GB is really not enough nowadays; on Windows you first need to refer to the Windows build instructions. More precisely, translation on 32-bit takes at this point 2.7 GB if PyPy is used and 2.9 GB if CPython is used. There are two workarounds:

    1. use PyPy, not CPython. If you don't have any PyPy so far, not even an older version, then you need to build one first, with some parts removed. So, first translate with ...rpython -Ojit targetpypystandalone --withoutmod-micronumpy --withoutmod-cpyext, then copy pypy-c and somewhere else, and finally call it with ...pypy-c ../../rpython/bin/rpython -Ojit.

    2. if even using PyPy instead of CPython is not enough, try to tweak some internal parameters. Example (slower but saves around 400MB):

    PYPY_DONT_RUN_SUBPROCESS=1 PYPY_GC_MAX_DELTA=200MB pypy --jit loop_longevity=300 ../../rpython/bin/rpython -Ojit --source
    # then read the next point about --source
  • You can run translations with --source, which only builds the C source files (and prints at the end where). Then you can cd there and execute make. This is another way to reduce memory usage. Note that afterwards, you have to run manually pypy-c .../pypy/tool/ if you want to be able to import the cffi-based modules.

  • On Linux, because of asmgcroot, compiling the generated C files is delicate. It requires using gcc with no particularly fancy options. It does not work e.g. with clang, or if you pass uncommon options with the CFLAGS environment variable. If you insist on passing these options or using clang, then you can compile PyPy with the shadow stack option instead (for some performance price in non-JITted code).

  • Like other JITs, PyPy doesn't work out of the box on some Linux distributions that trade full POSIX compliance for extra security features. E.g. with PAX, you have to run PyPy with paxctl -cm. This also applies to translation (unless you use CPython to run the translation and you specify --source).


Once PyPy is translated from source the binary package similar to those provided in the section Default (with a JIT Compiler) above could be easily created with script as following:

cd ./pypy/pypy/tool/release/
python --help #for information
python --archive-name pypy-my-own-package-name

It is recommended to use because custom scripts will invariably become out-of-date. If you want to write custom scripts anyway, note an easy-to-miss point: some modules are written with CFFI, and require some compilation. If you install PyPy as root without pre-compiling them, normal users will get errors:

  • PyPy 2.5.1 or earlier: normal users would see permission errors. Installers need to run pypy -c “import gdbm” and other similar commands at install time; the exact list is in Users seeing a broken installation of PyPy can fix it after-the-fact if they have sudo rights, by running once e.g. sudo pypy -c "import gdbm.
  • PyPy 2.6 and later: anyone would get ImportError: no module named _gdbm_cffi. Installers need to run pypy in the lib_pypy directory during the installation process (plus others; see the exact list in Users seeing a broken installation of PyPy can fix it after-the-fact, by running pypy /path/to/lib_pypy/ This command produces a file called locally, which is a C extension module for PyPy. You can move it at any place where modules are normally found: e.g. in your project's main directory, or in a directory that you add to the env var PYTHONPATH.


Here are the checksums for each of the downloads

pypy2.7-v5.3 md5:

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7d01e12eaca473258801faebc2db12d8  pypy2-v5.3.0-linux64.tar.bz2
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9c2cc832ba15fd4a08ba7e676226f406  pypy2-v5.3.0-linux-armhf-raspbian.tar.bz2
21a346cca4e8e6897381a0e647a86d68  pypy2-v5.3.0-osx64.tar.bz2
c39a578078ab3145d2a584cacf4c164c  pypy2-v5.3.0-s390x.tar.bz2
45ce35a438ed8ae1539cc05407d43965  pypy2-v5.3.0-src.tar.bz2

pypy2.7-v5.3.1 md5:

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41979b51bd5d8f9d6475b6478cf38992  pypy2-v5.3.1-linux64.tar.bz2
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be714716068e0e0c215e897f7c45ab34  pypy2-v5.3.1-linux-armhf-raspbian.tar.bz2
ae7c15c8b831847f359f673e3461b4e6  pypy2-v5.3.1-osx64.tar.bz2
a74f104c25aeb69d2eb2cdce01a2cb02  pypy2-v5.3.1-s390x.tar.bz2
2ebc87d24018c60cbf339de039dfecb0  pypy2-v5.3.1-src.tar.bz2

pypy3.3-v5.2-alpha md5:

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dc893175a5cae269017bb89637c3f260  pypy3.3-v5.2.0-alpha1-linux64.tar.bz2
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e1cfcd84dab5ded374802231c3e6f9f2  pypy3.3-v5.2.0-alpha1-osx64.tar.bz2
08b9b4dc0ab11fa22f0fc57ba9a62d2b  pypy3.3-v5.2.0-alpha1-s390x.tar.bz2
e4bbd6fe42481a17f705611d76914eda  pypy3.3-v5.2.0-alpha1-src.tar.bz2

pypy-1.8 sandbox md5:

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009c970b5fa75754ae4c32a5d108a8d4  pypy-1.8-sandbox-linux.tar.bz2

pypy2.7-5.3 sha1:

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939a49319ed8e25ecb9f646ba50f0618eb52c99b  pypy2-v5.3.0-linux64.tar.bz2
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1d4f5f547d798294755fc9e14e2b6490e8a5d194  pypy2-v5.3.0-s390x.tar.bz2
7bdb1cfc604192fc2a39023588d648a30975f0e4  pypy2-v5.3.0-src.tar.bz2

pypy2.7-5.3.1 sha1:

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a06eba349f6346dd6ab4c47f9dcccb0b42986478  pypy2-v5.3.1-linux64.tar.bz2
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3fd2fa66437ce72c179ea76522407cde74456e36  pypy2-v5.3.1-linux-armhf-raring.tar.bz2
3f7f2aea02e90c6f4a5da00588cd06fdb74aa406  pypy2-v5.3.1-linux-armhf-raspbian.tar.bz2
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3abd0c4d133fde7198bf81b15b7786e4e3de9f9f  pypy2-v5.3.1-src.tar.bz2

pypy3.3-v5.2-alpha sha1:

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ae62d0df060e245b30eb07f12c5bc2260695ac36  pypy3.3-v5.2.0-alpha1-linux64.tar.bz2
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addfd4466e4dead5a4e620214a015a314bfee83e  pypy3.3-v5.2.0-alpha1-linux-armhf-raspbian.tar.bz2
f4a3badfe4c70465e9a2a43fde19e7a92975bc20  pypy3.3-v5.2.0-alpha1-osx64.tar.bz2
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4b31ab492716ea375dd090bbacdf3d7c2d483059  pypy3.3-v5.2.0-alpha1-src.tar.bz2

pypy2.7-5.3 sha256:

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pypy2.7-5.3.1 sha256:

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6d0e8b14875b76b1e77f06a2ee3f1fb5015a645a951ba7a7586289344d4d9c22  pypy2-v5.3.1-linux64.tar.bz2
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pypy3.3-v5.2-alpha sha256:

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pypy-1.8 sandbox sha1:

895aaf7bba5787dd30adda5cc0e0e7fc297c0ca7  pypy-1.8-sandbox-linux64.tar.bz2
be94460bed8b2682880495435c309b6611ae2c31  pypy-1.8-sandbox-linux.tar.bz2