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HTML Picture Builder

Generate complete, selectable code locally with explicit format checks and no execution or external requests.

html-picture-builderLOCAL WORKSPACE

Enabling local controls…

Inputs and settings

Processed in this tab without uploading or storing inputs. Each text field is limited to 32 KiB and complete output to 1 MiB; additional format and model limits apply.

Results

Review the settings and run. Editing inputs clears old results.

Processing model and limits

Generates optional AVIF/WebP sources and a required fallback. At most 50 candidates per source, with unique consistent w or x descriptors. HTTP(S)/relative paths only; no data URLs or image fetch. sizes is escaped, not evaluated against a viewport.

Data and model checked: Specification and API reference ↗ToolHubEN: source controls ↗

How to use this tool

Load the example, confirm field units and processing rules, then run locally. Editing any input clears the old result. Copy or download the complete output explicitly.

When not to use it

Generates optional AVIF/WebP sources and a required fallback. At most 50 candidates per source, with unique consistent w or x descriptors. HTTP(S)/relative paths only; no data URLs or image fetch. sizes is escaped, not evaluated against a viewport.