The short version of the erc20 vs erc721 vs erc1155 question (ERC-20 vs ERC-721 vs ERC-1155 in full) is this: ERC-20 builds fungible tokens where every unit is identical (currencies, points, governance tokens), ERC-721 builds non-fungible tokens where every item is unique (art, deeds, named collectibles), and ERC-1155 is a multi-token standard that handles both fungible and non-fungible items in a single contract with cheap batch transfers. Pick the standard by asking whether your items are interchangeable, unique, or a mix of both.
That one sentence answers the question most people are searching. The part almost no comparison covers is the practical decision: when ERC-1155 actually beats ERC-721 on gas, what a batch mint really saves you, and which standard to reach for when your idea sits in the gray zone. This guide walks the real trade-offs, then points you at a generator so you can produce a working contract for whichever one fits.
ERC-20 vs ERC-721 vs ERC-1155 at a Glance#
Before the nuance, here is the whole comparison in one table. Read it top to bottom, then we will unpack the rows that actually drive a decision.
| Feature | ERC-20 | ERC-721 | ERC-1155 |
|---|---|---|---|
| Token type | Fungible | Non-fungible | Both (multi-token) |
| Each unit is | Identical | Unique | Unique or identical per ID |
| Contracts per project | One per token | Usually one per collection | One for many token types |
| Batch transfers | No (one transfer per call) | No (native) | Yes (built in) |
| Typical use | Currency, points, governance | 1-of-1 art, named NFTs | Games, editions, mixed assets |
| Tracks | A single balance per address | Individual tokenId ownership | Balance per tokenId per address |
| Standard year | 2015 | 2018 | 2019 |
The three standards are not competing versions of the same thing. They are different interfaces (sets of required functions) that wallets, marketplaces, and exchanges agree to understand. A token "is" ERC-20 because it implements the ERC-20 functions, nothing more. That is why interoperability works: any wallet that speaks ERC-20 can hold any ERC-20 token without custom code.
What ERC-20 Is and When to Use It#
ERC-20 is the fungible token standard. Fungible means interchangeable: one of your tokens is worth exactly the same as any other, the way every dollar bill is the same as every other dollar bill. The contract stores a single number per address (your balance) and lets you transfer some of it.
Reach for ERC-20 when your unit has no individual identity:
- A cryptocurrency or stablecoin.
- Governance tokens that grant voting weight by quantity.
- Loyalty points, in-app credits, or reward tokens.
- A utility token that gates access or pays fees.
The whole model is "address X owns N tokens." There is no concept of token number 7 versus token number 8, because they are indistinguishable. This is what makes ERC-20 cheap and simple. It also means it is the wrong tool the moment you need to prove that a specific item is one of a kind.
If you can swap any unit for any other unit without anyone caring, you want ERC-20. The instant uniqueness matters, you have outgrown it.
What ERC-721 Is and When to Use It#
ERC-721 is the non-fungible token (NFT) standard. Every token has a unique tokenId, and the contract tracks who owns each individual id. Token 1 and token 2 are distinct assets that can have different metadata, different images, and different prices.
Use ERC-721 when each item is genuinely one of a kind:
- 1-of-1 digital art or photography.
- Profile-picture collections where each piece has unique traits.
- On-chain representations of real-world assets (a specific deed, a specific ticket).
- Membership passes where each pass is individually tracked.
The cost of that uniqueness is overhead. Because the contract tracks ownership per id, minting and transferring are heavier than ERC-20, and minting a thousand separate NFTs means a thousand separate writes unless you use extra tooling. That overhead is the exact problem ERC-1155 was designed to solve. Each ERC-721 token also points to a metadata file (the JSON that holds the name, image, and traits), so the off-chain side matters as much as the contract. If you are minting a collection, you can lay out that JSON correctly with an NFT metadata generator before you deploy.
What ERC-1155 Is and When It Beats ERC-721#
ERC-1155 is the multi-token standard, and it is the one people understand the least. A single ERC-1155 contract can hold many token types at once, and each type can be fungible (thousands of identical copies) or non-fungible (a single unique item). Instead of "one balance per address," it tracks "balance per token id per address."
That design unlocks two things ERC-721 cannot do natively:
- Semi-fungible tokens. You can have 5,000 copies of "Health Potion" (id 1) and exactly one "Legendary Sword" (id 2) in the same contract. Editions, in-game items, and tiered passes all fit this model.
- Batch operations. You can transfer or mint many token ids in a single transaction with
safeBatchTransferFrom, instead of one call per item.
The gas case: where ERC-1155 actually wins#
This is the row every other comparison skips. ERC-1155's advantage is not magic, it is batching. If you mint or move items one at a time, ERC-1155 and ERC-721 are roughly comparable per item. The savings show up when you do many at once.
Consider a game airdropping a starter pack of 10 different items to a new player:
- ERC-721 approach: 10 separate mint transactions (or one custom batch function you wrote yourself). Each transaction carries its own base gas overhead.
- ERC-1155 approach: one
mintBatchcall that creates all 10 in a single transaction. You pay the base transaction cost once and a smaller incremental cost per item.
For a single transfer, the difference is minor and ERC-721 can even be slightly leaner. For ten or a hundred items at once, the batch standard pulls clearly ahead because you stop paying the fixed per-transaction overhead repeatedly. The honest rule: ERC-1155 wins on gas when batching is part of your real workflow, and ties or loses when everything is one-at-a-time.
Do not pick ERC-1155 "because it is cheaper." It is cheaper for batch-heavy patterns (games, large drops, editions). For a collection of strictly unique 1-of-1 art that people mint and trade individually, ERC-721 is simpler and the gas gap mostly disappears.
What ERC-1155 gives up#
Nothing is free. ERC-1155 metadata uses an id-substitution URI scheme that some older marketplaces and tools handle less gracefully than ERC-721's per-token URIs. The semi-fungible model is also more conceptually demanding, which means more ways to ship a bug. If your project is purely unique NFTs and you do not need batching, the extra power is just extra surface area.
The Decision Tree: Which Token Standard to Use#
Skip the spec-reading. Answer three questions in order.
- Are your items interchangeable (one unit equals any other)? If yes, use ERC-20. You are building a currency, points, or a governance token. Stop here.
- Is every item strictly unique, with no copies, and you mint and trade them individually? If yes, use ERC-721. You are building 1-of-1 art, deeds, or named collectibles.
- Do you have a mix (some unique, some in editions) or do you mint and move items in batches? If yes, use ERC-1155. You are building a game economy, an editions drop, or a multi-asset platform.
A few real-world mappings make this concrete:
| Project | Best standard | Why |
|---|---|---|
| Stablecoin or governance token | ERC-20 | Pure fungibility, balance-only model |
| 10,000-piece PFP collection | ERC-721 | Each piece unique, traded individually |
| Open-edition art (unlimited copies) | ERC-1155 | Many identical copies of one id |
| Web3 game with items + currency | ERC-1155 | Mix of fungible and unique, heavy batching |
| Event tickets, all identical | ERC-1155 or ERC-20 | Fungible if seats are not assigned |
| Real-estate deed on chain | ERC-721 | Each property is a distinct asset |
When you are genuinely on the fence between ERC-721 and ERC-1155, default to ERC-1155 if batching or editions are anywhere on your roadmap, and to ERC-721 if you want the simplest possible model for unique-only items with the widest legacy tool support.
From Decision to Deployable Contract#
Knowing the standard is half the job. The other half is producing a contract that compiles, follows the audited reference implementations, and includes the safety features you actually want (ownership controls, mint limits, pausing). Hand-writing this from scratch is where beginners introduce bugs.
A faster path is to generate the boilerplate and customize from there. The Molixa token contract generator produces ready-to-deploy Solidity for ERC-20, ERC-721, and ERC-1155, built on standard reference patterns, so you start from working code instead of a blank file. Generate the version that matches your decision tree answer, then adjust the parameters (name, symbol, supply, mint logic) for your project.
A sane build sequence:
- Pick the standard using the three questions above.
- Generate the matching contract and read through what it does before changing anything.
- Prepare your metadata (especially for ERC-721 and ERC-1155 collections).
- Deploy to a testnet first, mint a few tokens, and confirm a wallet displays them correctly.
- Only then deploy to mainnet.
If your token will ever be bought, sold, or earn yield, remember the tax side exists too. Disposals and rewards can be taxable events, and a crypto tax calculator helps you estimate the liability before it surprises you at filing time.
Common Mistakes When Choosing a Standard#
A handful of errors show up over and over.
- Using ERC-721 for editions. If you are selling 500 copies of the same artwork, that is 500 identical items, which is an ERC-1155 fungible id, not 500 separate ERC-721 tokens.
- Using ERC-20 for anything that needs identity. Tickets with assigned seats, memberships with individual perks, or collectibles cannot be ERC-20, because ERC-20 has no per-item tracking.
- Choosing ERC-1155 for pure 1-of-1 art. You inherit complexity you do not use, and some older tooling treats ERC-721 metadata more smoothly.
- Forgetting metadata is off-chain. The contract holds ownership; the name and image usually live in a JSON file the contract points to. Get that wrong and your NFT shows up blank.
Match the standard to the shape of your assets, not to whichever one is trendiest. The standards are tools, and the right one is the one that models your items with the least friction.
ERC-20 vs ERC-721 vs ERC-1155: The Bottom Line#
The whole erc20 vs erc721 vs erc1155 decision (ERC-20 vs ERC-721 vs ERC-1155) collapses into one idea: model your assets honestly. If units are interchangeable, ERC-20. If items are strictly unique, ERC-721. If you have a mix or you batch, ERC-1155, and lean on its batch transfers when that matches how your project actually mints and moves tokens. Get the model right first, then generate a contract for that standard and customize it, rather than forcing your idea into the wrong interface and patching around it later.
Frequently Asked Questions#
What is the main difference between ERC-20 and ERC-721? ERC-20 creates fungible tokens where every unit is identical and interchangeable, like a currency. ERC-721 creates non-fungible tokens where each item has a unique id and can have its own metadata and value. Use ERC-20 for currencies and points, and ERC-721 for unique items like 1-of-1 art.
Is ERC-1155 better than ERC-721? Not universally. ERC-1155 is better when you need a mix of fungible and unique items in one contract, or when you mint and transfer in batches, because batch operations save gas. ERC-721 is simpler and often the better choice for collections of strictly unique tokens that are minted and traded one at a time, where the gas advantage of ERC-1155 mostly disappears.
Does ERC-1155 always cost less gas than ERC-721? No. ERC-1155 saves gas specifically on batch operations, where you create or move many tokens in a single transaction instead of one transaction per token. For a single mint or a single transfer, the two are roughly comparable, and ERC-721 can even be marginally leaner. The savings appear only when batching is part of your real workflow.
What is a semi-fungible token? A semi-fungible token is one that behaves as fungible at one stage and non-fungible at another, or a token type that has many identical copies under a single id. ERC-1155 supports this directly, letting one contract hold thousands of identical "edition" tokens alongside truly unique one-of-a-kind items.
Which token standard should I use for an NFT collection? For a collection where every piece is unique and traded individually, ERC-721 is the classic choice. For open editions, in-game items, or collections that mix unique and multi-copy assets, ERC-1155 is usually better thanks to its batch minting and multi-token design. Decide by whether your items are strictly unique or include editions and batches.
Can I create these token contracts without writing Solidity from scratch? Yes. A contract generator produces standards-compliant Solidity for ERC-20, ERC-721, and ERC-1155 based on reference implementations, so you start from working code and customize parameters like name, supply, and mint rules. You should still test on a testnet and review the code before deploying to mainnet.
