# \#json **URL:** https://forums.unrealengine.com/tag/json/1482.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [JSON objects replication](https://forums.unrealengine.com/t/json-objects-replication/1233512)
**Author:** [@Anilarion](https://forums.unrealengine.com/u/Anilarion)\ **Replies:** 2\ **Last updated:** [June 5, 2026, 2:49pm UTC](https://forums.unrealengine.com/t/json-objects-replication/1233512 "2026-06-05T14:49:08Z")
I want to create an inventory system based on Json in a multiplayer project. Initially, I tried to replicate the Json object, but it doesn’t replicate. Do you have any idea how to do it? Thank you! --- ## [How to add custom wind for my own Tree with Nanite Assembles ?](https://forums.unrealengine.com/t/how-to-add-custom-wind-for-my-own-tree-with-nanite-assembles/2703507)
**Author:** [@user142562235231](https://forums.unrealengine.com/u/user142562235231)\ **Replies:** 1\ **Last updated:** [March 7, 2026, 10:30pm UTC](https://forums.unrealengine.com/t/how-to-add-custom-wind-for-my-own-tree-with-nanite-assembles/2703507 "2026-03-07T22:30:35Z")
I wanted to test the Nanite Assemblies Tree using Houdini. I’ve used various tutorials to create my own tree with its own instance branches. Everything works, but now I’m running into a problem: I don’t understand how to… --- ## [struct to JSON string doesnt work](https://forums.unrealengine.com/t/struct-to-json-string-doesnt-work/2322032)
**Author:** [@Hyrex](https://forums.unrealengine.com/u/Hyrex)\ **Replies:** 2\ **Last updated:** [November 17, 2025, 5:44pm UTC](https://forums.unrealengine.com/t/struct-to-json-string-doesnt-work/2322032 "2025-11-17T17:44:46Z")
Hi. I am trying to convert my map of strings to integers to json string it doesnt work. It is realy simple but I still couldnt figure out why it doesnt work. It prints false no matter what I do. --- ## [HTTP crash when not internet or invalid URL](https://forums.unrealengine.com/t/http-crash-when-not-internet-or-invalid-url/2631198)
**Author:** [@Zakkar](https://forums.unrealengine.com/u/Zakkar)\ **Replies:** 2\ **Last updated:** [August 22, 2025, 4:52pm UTC](https://forums.unrealengine.com/t/http-crash-when-not-internet-or-invalid-url/2631198 "2025-08-22T16:52:11Z")
Hi there, It seems we’re running into an old issue that was previously reported but never resolved: Game crashing when failing to connect to internet - #12 by anonymous\_user\_2b03d27c. After further investigation, I fo… --- ## [use AI (API Gemini) with varest in project](https://forums.unrealengine.com/t/use-ai-api-gemini-with-varest-in-project/2551271)
**Author:** [@Michelangelo\_AI](https://forums.unrealengine.com/u/Michelangelo_AI)\ **Replies:** 7\ **Last updated:** [June 13, 2025, 5:20pm UTC](https://forums.unrealengine.com/t/use-ai-api-gemini-with-varest-in-project/2551271 "2025-06-13T17:20:23Z")
i want use ai in my project. use api gemini. but when click on button show error 400. --- ## [Linking AI to unreal with varest: 'you must provide a model parameter"](https://forums.unrealengine.com/t/linking-ai-to-unreal-with-varest-you-must-provide-a-model-parameter/2531231)
**Author:** [@efwfew](https://forums.unrealengine.com/u/efwfew)\ **Replies:** 3\ **Last updated:** [May 28, 2025, 12:10pm UTC](https://forums.unrealengine.com/t/linking-ai-to-unreal-with-varest-you-must-provide-a-model-parameter/2531231 "2025-05-28T12:10:36Z")
Hi, i’m trying to “link” chat gpt inside Unreal for a little side project. Basically my goal is to give a prompt to chat gpt to fuse two items that appears on screen (and to give it a new name and lore) I’m a complete b… --- ## [A JSON error causes the packaging to fail](https://forums.unrealengine.com/t/a-json-error-causes-the-packaging-to-fail/414293)
**Author:** [@ArkasFr](https://forums.unrealengine.com/u/ArkasFr)\ **Replies:** 2\ **Last updated:** [April 6, 2025, 1:30pm UTC](https://forums.unrealengine.com/t/a-json-error-causes-the-packaging-to-fail/414293 "2025-04-06T13:30:37Z")
Hello everybody, When I try to make a cook in Win64 of the game. I have 3 errors like this that generate a “Failure”. This would be a JSON problem. In my project, JSON is only used to communicate with our remote databa… --- ## ["Convert struct to JSON String" reverse operation](https://forums.unrealengine.com/t/convert-struct-to-json-string-reverse-operation/2441518)
**Author:** [@HellFireHE](https://forums.unrealengine.com/u/HellFireHE)\ **Replies:** 2\ **Last updated:** [April 6, 2025, 12:28am UTC](https://forums.unrealengine.com/t/convert-struct-to-json-string-reverse-operation/2441518 "2025-04-06T00:28:17Z")
Hello I would like to write content of structure to JSON string, and then read it back. I tried plugin “JSON Blueprint utilities” While “Convert struct to JSON String” prepares nice JSON string, how to read it back in… --- ## [JSON file returns empty values in packaged build](https://forums.unrealengine.com/t/json-file-returns-empty-values-in-packaged-build/2382065)
**Author:** [@PixelIndieDev](https://forums.unrealengine.com/u/PixelIndieDev)\ **Replies:** 10\ **Last updated:** [March 17, 2025, 7:18pm UTC](https://forums.unrealengine.com/t/json-file-returns-empty-values-in-packaged-build/2382065 "2025-03-17T19:18:31Z")
Hi, I’m using Unreal Engine 5.5’s built-in JSON plugin to read a local JSON file. The JSON file contains a structure. Everything works fine in-editor. The file is read correctly, and the values are displayed on screen.… --- ## [Importing tile maps from Tiled](https://forums.unrealengine.com/t/importing-tile-maps-from-tiled/482228)
**Author:** [@Liam\_Cier](https://forums.unrealengine.com/u/Liam_Cier)\ **Replies:** 4\ **Last updated:** [February 3, 2025, 3:13pm UTC](https://forums.unrealengine.com/t/importing-tile-maps-from-tiled/482228 "2025-02-03T15:13:17Z")
I have been working on a tile map for a project of mine in Tiled, however I am having trouble importing it into Unreal. When I export from .json, the size is correct, but all the tiles are missing and there aren’t just e… --- ## [Fatal Error on HTTP Request in Export (Works in Viewport)](https://forums.unrealengine.com/t/fatal-error-on-http-request-in-export-works-in-viewport/2212871)
**Author:** [@DeborahSivolella](https://forums.unrealengine.com/u/DeborahSivolella)\ **Replies:** 2\ **Last updated:** [December 13, 2024, 9:40am UTC](https://forums.unrealengine.com/t/fatal-error-on-http-request-in-export-works-in-viewport/2212871 "2024-12-13T09:40:08Z")
Hi everyone! I’m experiencing an issue with my project in Unreal Engine 5.1, and I’m hoping someone here can help me figure it out. Goal: I’m trying to send JSON data to a server using an HTTP POST request. Works in V… --- ## [How can i generate json with two-dimensional array?](https://forums.unrealengine.com/t/how-can-i-generate-json-with-two-dimensional-array/730324)
**Author:** [@HoyangUS](https://forums.unrealengine.com/u/HoyangUS)\ **Replies:** 1\ **Last updated:** [December 10, 2024, 1:39am UTC](https://forums.unrealengine.com/t/how-can-i-generate-json-with-two-dimensional-array/730324 "2024-12-10T01:39:24Z")
I wanna generate json file with two-dimensional array as a property like below. { “two\_dim\_array” : \[ \[0.0, 0.1\], \[1.0, 1.1\] \] } How can i generate this json on UE ? The example of one-dimensional array. bool UGen… --- ## [Hi2 guys. I have a issue about UnrealBuildTool.Json file. Cant packaging BP project. Any idea for fix it. ](https://forums.unrealengine.com/t/hi2-guys-i-have-a-issue-about-unrealbuildtool-json-file-cant-packaging-bp-project-any-idea-for-fix-it/1899082)
**Author:** [@Creed976](https://forums.unrealengine.com/u/Creed976)\ **Replies:** 2\ **Last updated:** [November 21, 2024, 5:38pm UTC](https://forums.unrealengine.com/t/hi2-guys-i-have-a-issue-about-unrealbuildtool-json-file-cant-packaging-bp-project-any-idea-for-fix-it/1899082 "2024-11-21T17:38:13Z")
UATHelper: Packaging (Windows): \*\*\*\*\*\*\*\*\*\* BUILD COMMAND STARTED \*\*\*\*\*\*\*\*\*\* UATHelper: Packaging (Windows): Running: C:\\Program Files\\Epic Games\\UE\_5.3\\Engine\\Binaries\\ThirdParty\\DotNet\\6.0.302\\windows\\dotnet.exe “C:\\Pr… --- ## [Disappearing JSON object memory?](https://forums.unrealengine.com/t/disappearing-json-object-memory/2120977)
**Author:** [@CresCoJeff](https://forums.unrealengine.com/u/CresCoJeff)\ **Replies:** 7\ **Last updated:** [November 15, 2024, 4:24am UTC](https://forums.unrealengine.com/t/disappearing-json-object-memory/2120977 "2024-11-15T04:24:50Z")
I’m trying to parse JSON with the following general structure: { "dialogue": \[ { "name": "Test 1", "image": "Qyvnily\_WildFlower", "lines": \[ "Howie doin'?"… --- ## [How to stop case correction when converting from Struct to JSON in Packaged Build?](https://forums.unrealengine.com/t/how-to-stop-case-correction-when-converting-from-struct-to-json-in-packaged-build/450097)
**Author:** [@LastOfRamoria](https://forums.unrealengine.com/u/LastOfRamoria)\ **Replies:** 6\ **Last updated:** [November 7, 2024, 9:50pm UTC](https://forums.unrealengine.com/t/how-to-stop-case-correction-when-converting-from-struct-to-json-in-packaged-build/450097 "2024-11-07T21:50:36Z")
Have a custom struct I’m trying to convert to JSON. It successfully converts to JSON with the correct capitalization (matching the variable names of the struct) in the editor, but the capitalization on the variable names… --- ## [\[CRITICAL\] VALKYRIE ERROR - Missing DAD Creative User Options UPlaylistUserOptionDAD, LogJson Error, Unable to import enum EvalkyrieProjectTemplateCatagory](https://forums.unrealengine.com/t/critical-valkyrie-error-missing-dad-creative-user-options-uplaylistuseroptiondad-logjson-error-unable-to-import-enum-evalkyrieprojecttemplatecatagory/1669639)
**Author:** [@PledgedRanger](https://forums.unrealengine.com/u/PledgedRanger)\ **Replies:** 5\ **Last updated:** [September 12, 2024, 9:44am UTC](https://forums.unrealengine.com/t/critical-valkyrie-error-missing-dad-creative-user-options-uplaylistuseroptiondad-logjson-error-unable-to-import-enum-evalkyrieprojecttemplatecatagory/1669639 "2024-09-12T09:44:57Z")
Reference ID 538ff599-477d-8779-c3ff-ddafb85c318f Please select what you are reporting on: Unreal Editor for Fortnite What Type of Bug are you experiencing? Other Summary I Need Help Please? I have been having engine … --- ## [Varest Json Request](https://forums.unrealengine.com/t/varest-json-request/458819)
**Author:** [@huseyin12343](https://forums.unrealengine.com/u/huseyin12343)\ **Replies:** 8\ **Last updated:** [July 16, 2024, 4:20pm UTC](https://forums.unrealengine.com/t/varest-json-request/458819 "2024-07-16T16:20:16Z")
Im trying to send a json request with a header and parameters but cant see to do so. I can either send the header without parameters or, parameters without the header. But i need to be able to send both in the same reque… --- ## [\[Free\]\[Open Source\] DataConfig - JSON and MsgPack Serializer for Unreal Engine](https://forums.unrealengine.com/t/free-open-source-dataconfig-json-and-msgpack-serializer-for-unreal-engine/499175)
**Author:** [@jagttt](https://forums.unrealengine.com/u/jagttt)\ **Replies:** 3\ **Last updated:** [April 10, 2024, 4:08pm UTC](https://forums.unrealengine.com/t/free-open-source-dataconfig-json-and-msgpack-serializer-for-unreal-engine/499175 "2024-04-10T16:08:34Z")
Hi everyone! I’ve been working on a serialization framework for Unreal Engine. Recently I’ve got a new release with roundtrip-able serializers and JSON/MsgPack support. See : Introducing DataConfig 1.2. Download the r… --- ## [Struct to JSON](https://forums.unrealengine.com/t/struct-to-json/1679567)
**Author:** [@Herlehos](https://forums.unrealengine.com/u/Herlehos)\ **Replies:** 2\ **Last updated:** [February 11, 2024, 10:40am UTC](https://forums.unrealengine.com/t/struct-to-json/1679567 "2024-02-11T10:40:29Z")
Hi there! I have created a little dialogue tool for a RPG project inside a Editor Utility Widget, so my designers can create content directly inside Unreal with a cool interface (better than in Google Sheets … --- ## [How do I properly utilize JsonObjectStringToUStruct?](https://forums.unrealengine.com/t/how-do-i-properly-utilize-jsonobjectstringtoustruct/278907)
**Author:** [@TheAggie](https://forums.unrealengine.com/u/TheAggie)\ **Replies:** 6\ **Last updated:** [February 7, 2024, 8:35pm UTC](https://forums.unrealengine.com/t/how-do-i-properly-utilize-jsonobjectstringtoustruct/278907 "2024-02-07T20:35:55Z")
I’m trying to take an object from a json http response and convert it to a UStruct. I came across the JsonObjectStringToUStruct function via JsonUtilities.h. While it looks like the solution to my problem, I’m having som… --- ## [How to make two strings pass through Make Json. (As shown in the image)](https://forums.unrealengine.com/t/how-to-make-two-strings-pass-through-make-json-as-shown-in-the-image/1509408)
**Author:** [@leegalstreet](https://forums.unrealengine.com/u/leegalstreet)\ **Replies:** 0\ **Last updated:** [December 9, 2023, 5:59am UTC](https://forums.unrealengine.com/t/how-to-make-two-strings-pass-through-make-json-as-shown-in-the-image/1509408 "2023-12-09T05:59:04Z")
I wanted to add Voice Prompt and Text 1 strings to Message. But I can add only one. I have tried using Append. But it will also include Voice Prompt along with Text 1, When i get an output from Text 1. So how to make… --- ## [VaRest GET not working](https://forums.unrealengine.com/t/varest-get-not-working/479432)
**Author:** [@AgentArachnid66](https://forums.unrealengine.com/u/AgentArachnid66)\ **Replies:** 4\ **Last updated:** [November 8, 2023, 7:14am UTC](https://forums.unrealengine.com/t/varest-get-not-working/479432 "2023-11-08T07:14:05Z")
I’m trying to use the VaRest plugin to communicate with JSONbin.io to dump my analytics, but I need to be able to retrieve the JSON first. I’ve fiddled around with the API and the plugin but haven’t been able to figure o… --- ## [Critical Issue with UEFN engine, Null, String, Not Found](https://forums.unrealengine.com/t/critical-issue-with-uefn-engine-null-string-not-found/1361947)
**Author:** [@PledgedRanger](https://forums.unrealengine.com/u/PledgedRanger)\ **Replies:** 0\ **Last updated:** [November 4, 2023, 6:55am UTC](https://forums.unrealengine.com/t/critical-issue-with-uefn-engine-null-string-not-found/1361947 "2023-11-04T06:55:40Z")
Reference ID f6764ac0-4001-2f61-c9ff-01b087c30a64 Please select what you are reporting on: Unreal Editor for Fortnite What Type of Bug are you experiencing? Stability Summary Reference ID f6764ac0-4001-2f61-c9ff-01b08… --- ## [Convert JSON to Blueprint (?)](https://forums.unrealengine.com/t/convert-json-to-blueprint/1232546)
**Author:** [@ArtemKhadris](https://forums.unrealengine.com/u/ArtemKhadris)\ **Replies:** 3\ **Last updated:** [September 19, 2023, 5:59am UTC](https://forums.unrealengine.com/t/convert-json-to-blueprint/1232546 "2023-09-19T05:59:01Z")
Hello again, everyone! Is there any way to convert json to blueprint? For example, in this case, I know it’s a material (screenshot) and I can assemble it manually, but is there some automatic way? And, if such a method… --- ## [RMA Json Asset](https://forums.unrealengine.com/t/rma-json-asset/1175339)
**Author:** [@RafaelMAlmeida](https://forums.unrealengine.com/u/RafaelMAlmeida)\ **Replies:** 0\ **Last updated:** [May 23, 2023, 1:47am UTC](https://forums.unrealengine.com/t/rma-json-asset/1175339 "2023-05-23T01:47:19Z")
\[RMA Json Asset\] is designed to enable the binding of DataAsset properties with Json files, this brings several benefits, one of them is a better workflow since Json files are non-binary and can be easily merged into … --- ## [There is a bug in the Json library in UE](https://forums.unrealengine.com/t/there-is-a-bug-in-the-json-library-in-ue/1134511)
**Author:** [@goodriver](https://forums.unrealengine.com/u/goodriver)\ **Replies:** 6\ **Last updated:** [September 11, 2023, 7:56am UTC](https://forums.unrealengine.com/t/there-is-a-bug-in-the-json-library-in-ue/1134511 "2023-09-11T07:56:50Z")
Parsing float within JSON in C++yields values that do not match the data In the blueprint, the data obtained and sent using the blueprint plugin\[Json Blueprint Utilities\] is incorrect --- ## [Reading a JSON File and creating DataTable Assets?](https://forums.unrealengine.com/t/reading-a-json-file-and-creating-datatable-assets/1240437)
**Author:** [@Ronald\_Soelkner](https://forums.unrealengine.com/u/Ronald_Soelkner)\ **Replies:** 0\ **Last updated:** [July 26, 2023, 8:42am UTC](https://forums.unrealengine.com/t/reading-a-json-file-and-creating-datatable-assets/1240437 "2023-07-26T08:42:23Z")
I have this JSON File containing dialogs for our game. We implemented a dialog system using DataTables - one for each Character. So i was wondering if I can import the JSON files, end generate a DataTable Assets? How … --- ## [Update Datatable in blueprint](https://forums.unrealengine.com/t/update-datatable-in-blueprint/1239905)
**Author:** [@N7Pankake](https://forums.unrealengine.com/u/N7Pankake)\ **Replies:** 0\ **Last updated:** [July 25, 2023, 6:35pm UTC](https://forums.unrealengine.com/t/update-datatable-in-blueprint/1239905 "2023-07-25T18:35:30Z")
Hello! I’m aware we cannot update data tables in blueprints because they are read only but I have seen a few workarounds using structs aparently but I do not understand them cause I’m a bit new to this I would like some… --- ## [Convert JSON to Blueprint (?)](https://forums.unrealengine.com/t/convert-json-to-blueprint/1229588)
**Author:** [@ArtemKhadris](https://forums.unrealengine.com/u/ArtemKhadris)\ **Replies:** 0\ **Last updated:** [July 15, 2023, 2:56am UTC](https://forums.unrealengine.com/t/convert-json-to-blueprint/1229588 "2023-07-15T02:56:34Z")
Hello again, everyone! Is there any way to convert json to blueprint? For example, in this case, I know it’s a material (screenshot) and I can assemble it manually, but is there some automatic way? And, if such a method… --- ## [Document "WhitelistPlatforms"](https://forums.unrealengine.com/t/document-whitelistplatforms/411794)
**Author:** [@anonymous\_user\_bff5939d](https://forums.unrealengine.com/u/anonymous_user_bff5939d)\ **Replies:** 2\ **Last updated:** [May 20, 2023, 9:55am UTC](https://forums.unrealengine.com/t/document-whitelistplatforms/411794 "2023-05-20T09:55:18Z")
This is a documentation bug, but I am using Unreal 4.18.0 on mac. In the “uplugin” file, under “Modules”, a module entry may have a “WhitelistPlatforms” key. It is a list of strings. If I search google for “Unreal Whit… [Next page](https://forums.unrealengine.com/tag/json/1482.md?match_all_tags=true&page=1&tags%5B%5D=json)