Four small image tools, sorted by which way you are converting

You right-click an image, save it, and it turns out to be a .webp that your slide software or an upload form will not take. Or it is the other way round: your blog is full of heavy PNGs and you want them lighter. Or all you have is an SVG logo, and something needs a PNG or a favicon. Omikuji Tools splits these jobs across four pages, and all four do the work inside your browser — the images are never uploaded.

Image Converter: out of WebP (and into most other things)

The Image Converter takes PNG, JPEG, WebP and SVG files, several at once, and writes them out as PNG, JPEG, WebP, GIF, BMP, TIFF or PDF.

The detail I like is the background colour. JPEG has no transparency, so a transparent PNG has to be filled with something when it becomes a JPEG. Here you pick it — white, black, or a custom colour — instead of finding out afterwards that the tool chose black. There is a quality slider for JPEG and WebP, an optional maximum long edge, and Download all. Re-encoding through the canvas also drops EXIF metadata, location included.

WebP Converter: into WebP, with the savings shown

The WebP Converter goes the other way. Drop PNG or JPEG files (WebP and SVG are accepted too), set the quality (the page suggests 80) and, if you like, a maximum longest side such as 1920. For each file it shows the original size, the WebP size and how much you saved, plus a total for the whole batch — which is the number you actually want when you are trimming a site.

SVG Converter: one vector, any size

Because SVG is vector, the SVG Converter draws each export straight from the shapes, so a 3× PNG is sharp instead of stretched. You set the size by scale, width or height, and can crop to part of the drawing, with 1:1, 16:9, 4:3 and 3:2 ratio locks. Formats are PNG, JPEG, WebP, GIF, BMP, ICO, TIFF and PDF. ICO packs several sizes into one file — 16, 32 and 48 px are ticked by default, and 64, 128 and 256 are there if you need them — so one logo becomes a finished favicon.

Two limits worth knowing: output is capped at 268 megapixels (about 16384 × 16384) because browsers cap canvas size, and fonts or images the SVG links to externally are not loaded — convert text to outlines first.

Image Merge: several images, one file

Image Merge combines up to 30 images into a vertical strip, a horizontal strip, or a grid with the number of columns you choose. Reorder by dragging or with Up/Down buttons, set the spacing and background (transparent works for PNG and WebP), and optionally match widths or heights. Matching only ever scales images down to the smallest one, so nothing gets blurry from enlargement. You can paste images with Ctrl+V (⌘V), and export as PNG, JPEG or WebP at full resolution.

👉 Image Converter · WebP Converter · SVG Converter · Image Merge — free, no sign-up, nothing uploaded.

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