# Feature catalog — AUTOMATIC1111/stable-diffusion-webui

> Canonical page: https://codevetter.com/unpack/stable-diffusion-webui/feature-catalog

# Feature catalog — AUTOMATIC1111/stable-diffusion-webui

Scanned commit 82a973c04367123ae98bd9abdf80d9eda9b910e2 (2024-07-27). Generated by codevetter codevetter 1.12.0 on 2026-09-22.

User-facing features split across Gradio tabs (txt2img, img2img with six sub-modes, Extras upscaling/face-fix, PNG Info, Train for embeddings/hypernetworks, Checkpoint Merger, Settings, Extensions manager) and a ~40-route /sdapi/v1 REST API. Core generation supports txt2img/img2img/inpainting, hires-fix (second-pass upscale), ~30 samplers across k-diffusion/timesteps/LCM families, prompt scheduling and extra-network syntax, selectable scripts (xyz_grid, prompt_matrix, loopback, outpainting, sd_upscale, custom_code), and training of textual-inversion embeddings and hypernetworks.
- txt2img: UI calls modules/txt2img.py txt2img() → txt2img_create_processing() builds StableDiffusionProcessingTxt2Img with prompt/negative/styles/batch/cfg/hires-fix params (enable_hr, hr_scale, hr_upscaler, hr_second_pass_steps, hr_checkpoint_name) and per-request override_settings. — [modules/txt2img.py#L14-55](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/txt2img.py#L14-L55) [modules/processing.py#L1166-1168](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/processing.py#L1166-L1168)
- img2img + inpainting: modules/img2img.py builds StableDiffusionProcessingImg2Img (init_images, mask, denoising_strength, inpainting fields); the Gradio tab exposes six modes (img2img, Sketch, Inpaint, Inpaint sketch, Inpaint upload, Batch). — [modules/img2img.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/img2img.py) [modules/ui.py#L537-593](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/ui.py#L537-L593) [modules/processing.py#L1557](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/processing.py#L1557)
- REST API exposes POST /sdapi/v1/txt2img, /img2img, /extra-single-image, /extra-batch-images, /png-info, /interrogate, /interrupt, /skip, plus GETs for options, samplers, schedulers, upscalers, sd-models, sd-vae, hypernetworks, face-restorers, realesrgan-models, prompt-styles, embeddings, memory, scripts, script-info, extensions; POSTs for options, refresh-*, create/train embedding+hypernetwork, unload/reload-checkpoint. — [modules/api/api.py#L211-246](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/api/api.py#L211-L246)
- API auth is optional HTTP Basic via --api-auth 'user:pass,...' checked with secrets.compare_digest; the API also accepts image payloads as base64 or http(s) URLs, the latter gated by opts.api_enable_requests and SSRF-checked by verify_url() + opts.api_forbid_local_requests. — [modules/api/api.py#L58-99](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/api/api.py#L58-L99) [modules/api/api.py#L274-284](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/api/api.py#L274-L284)
- Sampler catalog is assembled in modules/sd_samplers.py from three families: sd_samplers_kdiffusion.samplers_data_k_diffusion, sd_samplers_timesteps.samplers_data_timesteps, sd_samplers_lcm.samplers_data_lcm; schedulers (Automatic/Karras/Exponential/etc.) live in modules/sd_schedulers.py and can be encoded in the sampler name suffix ('Euler a Karras'). — [modules/sd_samplers.py#L11-16](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/sd_samplers.py#L11-L16) [modules/sd_samplers.py#L100-122](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/sd_samplers.py#L100-L122) [modules/sd_schedulers.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/sd_schedulers.py)
- Prompt language supports attention weights ((word), (word:1.2)), prompt editing/scheduling ([a:b:step], [a|b] alternation) parsed by modules/prompt_parser.py get_learned_conditioning_prompt_schedules/parse_prompt_attention, and extra-network tags <name:args> extracted by extra_networks.parse_prompt. — [modules/prompt_parser.py#L28-50](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/prompt_parser.py#L28-L50) [modules/prompt_parser.py#L370](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/prompt_parser.py#L370) [modules/extra_networks.py#L175-191](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/extra_networks.py#L175-L191)
- Built-in 'scripts' in scripts/ are user-selectable generation programs: xyz_grid.py (X/Y/Z parameter plots), prompt_matrix.py, loopback.py, sd_upscale.py, outpainting_mk_2.py, poor_mans_outpainting.py, img2imgalt.py, prompts_from_file.py, custom_code.py (arbitrary Python, requires --allow-code), plus postprocessing_* wrappers. — [scripts/xyz_grid.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/scripts/xyz_grid.py) [scripts/prompt_matrix.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/scripts/prompt_matrix.py) [scripts/custom_code.py#L38-64](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/scripts/custom_code.py#L38-L64) [modules/scripts.py#L487-531](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/scripts.py#L487-L531)
- Extras tab does single/batch image postprocessing (upscale via ESRGAN/RealESRGAN/SwinIR/LDSR/ScuNET/DAT upscalers, GFPGAN/CodeFormer face restoration) via modules/postprocessing.py and modules/ui_postprocessing.py, exposed to API as /sdapi/v1/extra-single-image and /extra-batch-images. — [modules/postprocessing.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/postprocessing.py) [modules/ui_postprocessing.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/ui_postprocessing.py) [modules/api/api.py#L213-214](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/api/api.py#L213-L214)
- Train tab + API can create and train textual-inversion embeddings (textual_inversion.create_embedding/train_embedding) and hypernetworks (create_hypernetwork/train_hypernetwork), with preview images routed through txt2img params. — [modules/textual_inversion/textual_inversion.py#L259-400](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/textual_inversion/textual_inversion.py#L259-L400) [modules/hypernetworks/hypernetwork.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/hypernetworks/hypernetwork.py) [modules/api/api.py#L237-240](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/api/api.py#L237-L240) [modules/ui.py#L899-996](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/ui.py#L899-L996)
- PNG Info tab + /sdapi/v1/png-info parse generation parameters ('infotext') embedded in PNG text chunks or JPEG/WEBP EXIF UserComment; modules/infotext_utils.py handles parse_generation_parameters and send-to-txt2img/img2img paste. — [modules/infotext_utils.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/infotext_utils.py) [modules/images.py#L777](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/images.py#L777) [modules/api/api.py#L215](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/api/api.py#L215)
- Extra Networks UI (modules/ui_extra_networks.py) renders browsable card pages for checkpoints, textual inversion, hypernetworks, and Lora (registered by extensions-builtin/Lora) with per-file .json user metadata (extra_networks.get_user_metadata) served as in-app HTML pages via add_pages_to_demo. — [modules/ui_extra_networks.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/ui_extra_networks.py) [modules/extra_networks.py#L209-225](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/extra_networks.py#L209-L225) [extensions-builtin/Lora/ui_extra_networks_lora.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/extensions-builtin/Lora/ui_extra_networks_lora.py) [webui.py#L114](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/webui.py#L114)
- Checkpoint Merger tab (modules/ui_checkpoint_merger.py) merges two/three checkpoints into a new .safetensors file; Settings tab (modules/ui_settings.py) edits the OptionInfo registry with quicksettings bar, search, and per-setting apply/restart semantics. — [modules/ui_checkpoint_merger.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/ui_checkpoint_merger.py) [modules/ui_settings.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/ui_settings.py) [modules/ui.py#L1110-1128](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/ui.py#L1110-L1128)
- Extensions tab (modules/ui_extensions.py) lists installed extensions with git update status (check_updates/fetch_and_reset_hard), installs new ones from a URL or the built-in index, manages disable lists persisted to config.json, and can save/restore whole config states into config_states/ JSON backups. — [modules/ui_extensions.py#L26-122](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/ui_extensions.py#L26-L122) [modules/ui_extensions.py#L344-396](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/ui_extensions.py#L344-L396) [modules/config_states.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/config_states.py)
- Progress/interruption features: modules/progress.py exposes /internal/progress and /internal/pending-tasks; shared_state.State supports skip/interrupt/stop generation and server stop/restart commands; /sdapi/v1/progress returns live ETA/current image. — [modules/progress.py#L76-78](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/progress.py#L76-L78) [modules/shared_state.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/shared_state.py) [modules/api/api.py#L216-219](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/api/api.py#L216-L219)
- ngrok tunneling (--ngrok token) and gradio --share provide remote access; TLS via --tls-keyfile/--tls-certfile; --listen/--server-name control bind address; Gradio auth via --gradio-auth/--gradio-auth-path; subpath for reverse proxies via --subpath. — [modules/ngrok.py](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/ngrok.py) [modules/cmd_args.py#L47-51](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/cmd_args.py#L47-L51) [modules/cmd_args.py#L77-119](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/modules/cmd_args.py#L77-L119) [webui.py#L79-96](https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/82a973c04367123ae98bd9abdf80d9eda9b910e2/webui.py#L79-L96)

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