Newest Hacks

Brightness fix SMAS + SMW  Improvement Latinfix Super Royal Pals.

Newest Translations

Mother Zelda II: The Adventure of Link Lunar Pool Final Fight

Newest Utilities

sf_decrunch Elemental Gearbolt (PSX) BIN repacker Super Gokuden 1 Translation Tools DashEditor - Mega Man Legends Translation Toolkit

Newest Reviews

Ancient Chozo Mario's Journey Through Time & Space Final Fantasy IV - Ultima Super Princess Sis - Two Drunk Princess (Two Players Hack)

Newest Homebrew

4 Way Play test ROM Retail Clerk '89 Sega Genesis 6 button controller test Parachute

Featured Hack Images

Super Mario World: Graphics Hack Super Metroid - Maridia / Norfair Adventures of Lolo - MMC1 to MMC3 Snow Brothers - Return of the King Scorch

Featured Translation Images

Tetris Donkey Kong Land III Metal Gear Star Wars Episode I: Racer

Recent Updates

  • Reviews
    Added some clarification about the effects when using different emulators.
  • Community
    The page used the old avatar
  • Community
    I've been credited for a code I made (in the Super Candra Sisters rom hack of Super Mario Bros.), code name is "Always Appear As Big Mario". The process of making the code is on my YouTube channel which I linked to.
  • Credits
    Added LeonarthCG to the credits, because he helped on adding the Guntz image to the Dream Stone Gallery.

[NES] Super Mario Bros Level Editor - GreatEd

Level Editors


This is a powerful level editor for NES Super Mario Bros. It allows to create new areas, add, delete, move and resize objects on all areas, also can easily make pointers for pipes, vines etc. Also you can make a lot of modifications on an engine. Please note, that editor automatically converts ROM into the MMC3 mapper, so keep backup of original ROM.

More information included in archive in the readme.pdf.

Supported x64 versions of Windows 7, 8, 10,

Also included x86 (32 bit) version for Windows XP


User Review Information

Doesn't emulate like SMB Utility

Reviewed By: insectduel on 10 Sep 2019

I have enjoyed using GreatEd and I think it’s pretty cool to use and I think it’s an extent to the SMB1 romhacking community. However I have complaints of why I didn’t like it as much as using SMB Utility. Unlike SMB Utility, you can’t swap enemies or objects you can only add or delete them. The features of the editor is cool such as editing warp zones, coins for 1-UP even the Spiny fall hacks but how can you miss the Bowser kill enemies feature for each world although you can extend by adding more enemies if you relocate the LDA address into free space.

What is incredibly annoying is that you can’t open levels while a certain code reaches ram $6000 or $7000 (I have copied SMB2J items and change the RAM address to $F000 manually) based on the in-game objects or enemies. I also notice that the Loop Commands are re-written after you open the SMB1 original ROM and save it (make sure you uncheck read only) so I haven’t got time to test the feature further because it can only load loops by area number which is great but I prefer the original SMB1 or SMB2J loop code.

The most part of the review is that GreatEd doesn’t emulate SMB1 like with SMB Utility. If I install upside down pipes only SMB Utility can see it while GreatEd does not or other SMB2J related objects. This is an issue when making levels in SMB2J object style which can mistakenly read. For example, the Used Block (use for Firebars) in SMB2J is rewritten code but the Axe is shown on GreatEd which is the SMB1’s object hex number OR if the SMB2J pipe used in underwater levels can reads the SMB1 flagpole in the editor but the positioning of the SMB2J pipe is at the top.

Overall, GreatEd should have its own emulator like SMB Utility but connecting your own Emulator is good too, but I prefer SMB Utility better.

Version 1.1 Recommended - No

User Reviews
THE best editor ever.Jeansowaty13 Jul 20201.3.1Yes
Good for simple hacksgassug203 May 20201.3.1Yes
Liked itDanielFA25 Nov 20191.1Yes
Doesn't emulate like SMB Utilityinsectduel10 Sep 20191.1No
Very Good, but Hard to Compete with SMB Utilitysegwayspeedracer25 Aug 20191.1Yes
Cool but an issueStudsX17 Aug 20191.1Yes
Great! Editor.Zerano30 Jan 20201.1Yes
A great editor for this classic = awesome!Googie24 Jul 20191.1Yes