> For the complete documentation index, see [llms.txt](https://spawnmeme.gitbook.io/spawnmeme-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://spawnmeme.gitbook.io/spawnmeme-docs/feature-guides/nfts/20-public-mint-setup.md). # 20. Launch a public NFT mint Upload a collection set, define price and limits, and recover interrupted storage or launch steps. **Open:** your collection page → **Launch a public mint**. Sign in as the creator and connect the collection's creator wallet. Public-mint creation must be enabled; an admin preview is not general availability. ## Prepare your files * Select a set of 2–10,000 images, within the limits shown by the form. * Use PNG, JPG, WebP or GIF, up to 5 MB each. * Give every image a unique filename. Keep the original files for recovery. * Optionally prepare a JSON traits file keyed by the exact image filenames. ```json { "1.png": { "Background": "Lime", "Hat": "Crown" }, "2.png": { "Background": "Black", "Hat": "None" } } ``` The uploader also accepts arrays of `trait_type`/`value` objects. Filenames must match, including extensions. [Download the example traits file](https://1318082464-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fn4TawV5u26iTOJGwBeyB%2Fuploads%2F5ROhUKUUcvTbroxuty40%2Fnft-traits.json?alt=media) and replace its example filenames and values. Prepare only public artwork and metadata: uploaded permanent files cannot be withdrawn. ## Set up the mint 1. Under **1. Images**, select all images together. 2. Inspect the image count and order. Files are numbered by filename; optionally choose **Shuffle the order before uploading**. 3. Add the optional **Traits file** and review any parsing message. 4. Under **2. Mint settings**, enter the **NFT name** prefix, up to 20 characters. Items receive numbered names such as `Collection #1`. 5. Set **Price per NFT (SOL)**, **Minting opens**, optional **Minting closes** and optional **Limit per wallet**. Date/time inputs use the browser's local time; check your timezone before announcing an opening time. 6. Review the storage quote, setup network cost and what each buyer will pay. 7. Choose **3. Pay for storage and upload**. Approve the storage payment and keep the tab open until all files are stored. 8. Recheck the final settings, then choose **4. Create the public mint** and approve the separate on-chain setup transaction. 9. Confirm that the collection page displays the public **Mint** panel and correct rules. Setting the creator price to zero does not remove SPAWN's public-mint fee or network costs. Buyers receive the next item in number order. Uploaded images are already public; this is not a hidden-art reveal system. ## Recover an interruption | Situation | Recovery | | -------------------------------- | -------------------------------------------------------------------------------------------------------------------------- | | Storage upload stopped | Return in the same browser, select the exact original images and choose **Continue the upload**. | | Files/names locked | Upload preparation has begun; use the original set. | | Setup transaction pending | Choose **Finish launching** and inspect the existing signature. | | Need to restart before launch | **Start over** warns that paid storage is not refunded and uploaded files remain public. Read the warning before using it. | | Wrong creator wallet | Reconnect the original collection wallet. | | Invalid traits file | Use valid JSON, exact filenames and nonempty trait names/values. | | Rules need changing after launch | SPAWN currently provides no edit control for the price, times or per-wallet limit after launch. | Keep local browser data and original files until completion. Do not start a second paid setup simply because confirmation or indexing is slow. **Next:** share the collection URL and [buyer instructions](/spawnmeme-docs/feature-guides/nfts/21-minting-and-collecting.md). *** [Guide home](/spawnmeme-docs/feature-guides.md) · [Troubleshooting](/spawnmeme-docs/feature-guides/reference-and-support/38-troubleshooting.md) · [Get help](/spawnmeme-docs/feature-guides/reference-and-support/39-support-and-safety.md) --- # Agent Instructions This documentation is published with GitBook. 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