ABOUT AUTOWEBP

AutoWebP Multi-Format Responsive Image Engine

AutoWebP is a free local-first browser and Progressive Web App image-processing engine developed by Alpha & Omega Limited. It is designed to turn one image or a batch of images into complete responsive image sets without requiring source-image uploads to an Autoimage conversion server.

Major still-image inputs

The current engine accepts JPG/JPEG/JFIF, PNG, WebP, AVIF, HEIC/HEIF, TIFF/TIF, GIF, BMP, SVG and ICO inputs. Browser-native decoding is used where reliable; AVIF, HEIC/HEIF and TIFF can use local-running codec fallbacks when the browser itself cannot decode the format.

Selectable output formats

Users can generate one or several output formats in the same processing run: WebP, AVIF, JPEG, PNG, still-frame GIF, TIFF, BMP and ICO. ICO output is intended for icon sizes up to 256 pixels. AutoWebP treats animated inputs as a still-image workflow and does not claim to preserve animation.

Responsive image production

The same source can be rendered at 320, 480, 640, 768, 1024, 1280, 1536, 1920 and 2560 pixel presets plus user-defined widths. Widths at or above the original source width are skipped so responsive outputs are not enlarged.

Orientation-aware source handling

For supported JPEG and TIFF sources, AutoWebP reads source-orientation information before responsive resizing and normalizes the displayed orientation into the generated pixel output. This helps prevent rotated or mirrored camera-originated files from producing incorrectly oriented responsive derivatives while preserving the source aspect ratio after orientation is resolved.

High-quality resizing

Large reductions can use progressive multi-step downscaling before the final render. Aspect ratio is retained automatically. Full-size re-encoded copies may also be generated where selected.

Format-aware quality

WebP, AVIF and JPEG have independent quality controls. PNG is produced as a lossless-style browser output. JPEG and BMP cannot preserve alpha transparency, so transparent pixels are flattened onto the background colour selected by the user.

Local codec architecture

AutoWebP uses native browser codecs when available. For formats that need additional support, pinned codec modules can be downloaded from a third-party code-delivery network and executed locally in the browser. These codec modules process image data on the device; AutoWebP does not send the user's source image to those codec providers for remote conversion.

AVIF without native Canvas encoding

If the browser cannot encode AVIF through Canvas, AutoWebP can use a WebAssembly AVIF encoder derived from the jSquash/Squoosh codec ecosystem. This removes the earlier limitation where AVIF output was disabled simply because the browser lacked native Canvas AVIF encoding.

HEIC and HEIF

HEIC/HEIF files can be decoded locally using a browser-compatible libheif implementation when native browser decoding is unavailable, making phone-originated HEIC images usable as sources for WebP, AVIF, JPEG, PNG and the other supported still-image outputs.

TIFF, GIF, BMP and ICO

TIFF uses a local JavaScript codec where necessary. GIF output is a single-frame still-image export. BMP and ICO output are generated inside the application. SVG is accepted as an input and rasterised when converted to raster output formats.

Batch workflow and ZIP export

Multiple sources, output formats and responsive widths can be combined in one processing run. Each generated file can be downloaded individually or the complete result can be packaged into a ZIP archive in the browser.

Responsive HTML

For web-production workflows AutoWebP generates ready-to-adapt <picture> and srcset markup using available AVIF, WebP, JPEG and PNG responsive outputs.

Duplicate detection

Exact duplicate source files can be identified locally using SHA-256 so users can avoid generating repeated output unnecessarily.

PWA and offline capability

AutoWebP is installable as a Progressive Web App on supported platforms. The application shell and successfully cached codec assets can be reopened without a normal page load. A codec that has never previously been downloaded and cached may require an Internet connection the first time it is needed.

Privacy model

Source images are not uploaded to an AutoWebP image-conversion server for the core conversion workflow. Processing occurs on the user's device. Normal website requests, codec-module downloads, hosting logs and optional operational PWA metrics remain subject to the Privacy Policy.

Free to use

AutoWebP is provided as a free image-processing application. There is no subscription required simply to use the converter.

Developed by Alpha & Omega Limited

AutoWebP is a technology product of Alpha & Omega Limited. For general enquiries contact contact@autowebp.com.