Free browser tools for KoboldCpp
Six free tools for KoboldCpp, all running in your browser with nothing uploaded: a download picker, a VRAM and GPU layers calculator, a launch command and .kcpps builder, a log analyzer, an API tester and a chat template finder. They are built from KoboldCpp's public data and checked against our own test results.
Checked against KoboldCpp 1.124.2 · updated 13 Nov 2026
- lab-lnx: Linux test VM · 4 vCPU · 15 GB · no GPU
- gha-w25: Windows Server 2025 test machine · 4 vCPU · 16 GB · no GPU
- gha-u24: Ubuntu 24.04 test machine · 4 vCPU · 16 GB · no GPU
On this page
The six tools
- Download picker: which file do I need?Tells you the exact file for your system and links to GitHub. Tested with F01.
- VRAM and GPU layers calculatorWill this model fit, how many layers, what context. Tested with F10, F36, F63, F65, F67.
- Launch command and .kcpps builderBuild or check a command; fix renamed flags. Tested with F08, F76 against the real program.
- Log analyzer (start here with a problem)Paste a log, get the cause and the fix. Tested with F17 to F22.
- API URL and key testerCheck your server, build requests in six languages. Tested with F23 to F25, F77, F78.
- Chat template and thinking finderThe adapter and thinking switch for your model. Tested with F79, F80.
Start with the log analyzer if something is wrong, and the download picker if you are new.
Which tool for which problem
| Which file should I download? | Download picker |
| Will this model fit in my GPU, and how many layers? | VRAM calculator |
| It ran out of memory | Log analyzer, then the calculator |
| It does not use my GPU | Log analyzer |
| My command or saved settings do not work | Command builder |
| My app cannot connect | API tester |
| The model writes odd text or thinks too long | Template finder |
How our tools handle your data
Everything runs in your browser. Share links keep your inputs in the part of the address after the hash sign, which the browser does not send to our server. Only two things reach another server: the calculator reads a model’s header from Hugging Face when you paste a link, and the API tester calls the server you type. See privacy.
How we check the tools
Each tool has automated tests that run in our build, many against the real KoboldCpp program: the command builder was checked on 20 configurations F76, the template finder is checked against 18 model-name fixtures and the real adapter files, and the calculator is calibrated on measured memory F10. How we test is on how we test.
Looking for koboldcpp_tools.zip?
People searching “KoboldCpp tools” may want the project’s own conversion and quantizing tools (quantize_gguf, gguf-split and others). They are published as koboldcpp_tools.zip under the kcpp_tools_rolling pre-release on GitHub; we never host it. See Hugging Face downloads for when you need it.
Tools we decided not to build
| A standalone context calculator | It is a slider in the VRAM calculator | VRAM calculator, context size |
| A standalone model picker | Keeping a list fresh is the hard part | Models |
| A sampler preset generator | It is taste, with no single right answer | Settings and starting points |
| A hosted online demo | Cost and abuse; the Horde and Lite already exist | KoboldAI |
Frequently asked questions
Are these tools official?
No. They are independent and built from KoboldCpp's public data. KoboldCpp's own tools, such as the quantizer, are in koboldcpp_tools.zip on GitHub.
Do the tools send my logs or files anywhere?
No. They run in your browser. Share links keep your inputs in the part of the address after the hash sign, which your browser does not send to us. The two outside requests are the VRAM calculator reading a model header from Hugging Face when you paste a link, and the API tester calling the server you type.
Do the tools work offline?
Once a tool page has loaded, the download picker, calculator, builder, log analyzer and template finder work without a network. The API tester needs to reach your KoboldCpp server, and the calculator's Hugging Face link option needs the internet.