Free developer tools

Developer tools

The asset pipeline, in a browser tab

Optimise SVGs, generate favicons and responsive image sets, convert GIFs to video and compress audio and PDFs — free, nothing uploaded.

Images

SVG, icons, responsive sets and data URIs.

SVG OptimizerSVGO, plus JSX and data URI output Favicon GeneratorICO, PNG sizes, manifest and head tags Responsive Image Generatorsrcset in AVIF, WebP and JPEG + <picture> Image to Base64Data URI, CSS, HTML and Base64 → image

Video & audio

Lighter animation, posters and sound.

GIF to MP4 / WebMSwap heavy GIFs for tiny video Video to GIF / WebPClip a video into an animated GIF or WebP Video Frame ExtractorPoster frames and stills from any video Audio CompressorMP3, AAC or Opus at the bitrate you pick

Documents

Smaller PDFs, processed locally.

PDF CompressorShrink the images inside a PDF

Questions

Questions about the developer tools

Everything here runs in your browser — nothing you add is uploaded. More in the general FAQ.

Are these developer tools free?

Yes. Every tool is free with no account, no limits and no watermark.

Are my files uploaded?

No. SVG optimisation, icon generation, image encoding, video, audio and PDF processing all run in your browser.

Which browsers are supported?

Current Chrome, Edge, Firefox and Safari. The video and audio tools use WebCodecs, which is fastest in Chrome and Edge; each tool says so if your browser lacks something it needs.