GIF effects · Free · No upload

Rainbowify a GIF

Rainbow GIF adds a cycling rainbow colour effect to a GIF or still image. Hue cycle rotates every colour around the colour wheel — best for colourful images — while Rainbow tint washes the image in one shifting colour, keeping its light and dark tones — best for black, white or grey images like logos and emoji. Stills are turned into a looping animation automatically.

  • Runs in your browser
  • No sign-up
  • No watermark
  • Works on mobile
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How to use Rainbow GIF

  1. 01

    Upload a GIF or image

    Drop a GIF, PNG, JPG or WebP — emoji and logos work great.

  2. 02

    Choose the effect

    Hue cycle or Rainbow tint, number of cycles and (for stills) frames and speed.

  3. 03

    Rainbowify

    Click Rainbowify and download the looping GIF.

Hue cycle vs rainbow tint

Hue cycle rotates each pixel’s hue around the colour wheel, so reds become oranges, then yellows, greens and so on, while saturation and brightness stay the same. It looks great on colourful artwork but does nothing to black, white or grey pixels — they have no hue to rotate. Rainbow tint solves that: it measures each pixel’s lightness and paints it with the current rainbow colour, so monochrome logos and emoji light up too.

Because the colour completes whole trips around the wheel, the last frame flows straight back into the first: the loop is seamless at any number of cycles.

Making party emoji

Custom emoji should be small. Start with a square image, rainbowify it, then resize to 128×128 and check the size — Discord emoji must be under 256 KB, and the GIF compressor can help. Combine with GIF filters for other colour looks, or remove a background first so only the subject changes colour.

Features

  • Two rainbow styles

    Shift every colour, or tint by luminance.

  • Animates stills

    A single image becomes an 8–48 frame colour loop.

  • Seamless loops

    Colours complete whole cycles, so the loop never jumps.

  • Transparency kept

    Perfect for Slack and Discord “party” emoji.

Rainbow GIF FAQ

How do I make a rainbow GIF?

Upload a GIF or image, choose Hue cycle or Rainbow tint, set the number of colour cycles and click Rainbowify.

Why doesn’t my black-and-white image change colour?

Hue cycle can’t colour grey pixels because they have no hue. Switch to Rainbow tint, which colours by brightness.

Can I rainbowify a still image?

Yes. Still images are turned into a looping animation; choose how many frames and how fast the colours change.

Is it free, and is there a watermark?

It is completely free with no sign-up, no usage limits and no watermark on the output.

Are my files uploaded to a server?

No. GifRush processes everything locally in your browser using JavaScript, Canvas, Web Workers and WebCodecs. Your files never leave your device, and closing the tab discards them.

GIF Filters

Apply filters to a GIF — grayscale, sepia, vintage, noir, invert — and adjust brightness, contrast and colour.

10 filtersAdjustmentsLive preview

GIF Background Remover

Remove a solid background from a GIF to make it transparent, or swap in a new colour.

TransparentGreen screenColour key

GIF Resizer

Scale an animated GIF to an exact width and height, or by percentage, keeping every frame.

PixelsPercentAspect lock

GIF Compressor

Reduce GIF file size with fewer colours, lossy frame diffing, frame dropping and scaling.

LossyColoursFrames

Add Text to GIF

Put meme-style captions on an animated GIF — top and bottom text, colours and outline.

CaptionsMemeOutline

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