Do all my PNG frames need to be the same size?

Yes. Every frame is drawn into the same logical GIF screen, so this tool requires every uploaded PNG to share the exact width and height of the first frame; mismatched frames are rejected with a clear error.

How many frames can I combine?

Up to 64 frames per animation. There's no strict technical ceiling in the GIF format itself, but a very large frame count makes for a slow encode and a large file.

Why does the color look slightly different in the GIF?

GIF supports at most 256 palette colors and no true 24-bit color, so each frame is quantized to a 216-color uniform palette (plus one reserved transparent slot); colors that don't land exactly on that grid show mild banding.

How does looping work?

The GIF includes a standard NETSCAPE2.0 application extension with a loop count of 0, which every major browser and image viewer interprets as "loop forever."

PNG to Animated GIF Converter - Combine PNGs into a Looping GIF

Overview

Introduction

This tool combines several same-size PNG images into a single animated GIF, entirely in your browser, with no server upload.

Each frame is quantized and LZW-compressed exactly as the GIF89a specification requires, then wrapped with the timing and looping metadata that makes it play as an animation.

What Is PNG to Animated GIF Converter?

A client-side PNG-sequence-to-animated-GIF converter that decodes each uploaded frame, builds one shared 216-color palette, compresses every frame's pixel-index stream with a hand-written LZW encoder, and assembles the result into a single valid GIF89a file.

It includes a Netscape looping extension so the animation repeats indefinitely in any standard viewer.

How PNG to Animated GIF Converter Works

Every uploaded frame is decoded to a pixel buffer and validated to share the first frame's exact dimensions; any pixel with alpha below 128 is mapped to a reserved transparent palette index, while opaque pixels are quantized to the nearest color on a uniform 6x6x6 color cube.

Each frame's quantized index stream is LZW-compressed per the GIF spec and written as its own Graphics Control Extension (carrying the delay and transparency flag) plus Image Descriptor block; all frames share one Global Color Table declared once at the top of the file.

When To Use PNG to Animated GIF Converter

Use it to turn a short sequence of exported PNG frames — from a sprite animation, a stop-motion capture, or a simple loading spinner — into a single shareable animated GIF.

It's also useful for quickly previewing how a frame sequence looks in motion before committing to a heavier video-based export.

Often used alongside PNG to RGBA Converter and PNG Dimensions Finder.

Features

Advantages

Runs entirely client-side; your frames never leave the browser.
Produces a real, spec-compliant GIF89a file with an actual LZW-compressed data stream, not a fake or placeholder.
Supports per-pixel transparency and a configurable frame delay.

Limitations

GIF's 256-color palette means photographic frames can show visible color banding compared to the source PNGs.
All frames must share identical dimensions; this tool doesn't crop, pad, or resize mismatched frames automatically.

Examples

Build a 3-frame loading spinner

Input

Three 32x32 PNG frames, 10 centisecond delay

Output

A looping animated GIF that cycles through all three frames every 30 centiseconds

Each frame gets its own Graphics Control Extension carrying the same delay value.

Reject mismatched frame sizes

Input

A 64x64 PNG followed by a 32x32 PNG

Output

An error: "All frames must share the same width and height as the first frame."

GIF's single logical screen size means every frame must be drawn at identical dimensions.

Best Practices & Notes

Best Practices

Export all frames at identical dimensions before uploading to avoid the size-mismatch error.
Use a shorter delay (fewer centiseconds) for smoother-looking motion, and a longer one for a slideshow-style animation.

Developer Notes

The pure encoding logic lives in a lib function that operates on an array of plain PixelBuffers with no DOM dependency, reusing the same 216-color quantization and hand-rolled LZW compressor approach as the single-frame PNG-to-GIF converter, extended with a Netscape looping extension and one Image Descriptor per frame.

PNG to Animated GIF Converter Use Cases

Turning exported sprite-sheet frames into a single animated GIF
Building a simple looping loading indicator
Combining a short stop-motion PNG sequence into a shareable animation

Common Mistakes

Uploading frames of different sizes, which the tool rejects rather than silently cropping or stretching.
Expecting perfect color fidelity — GIF's 256-color palette limit means some banding is inherent to the format, not a bug.

Tips

Keep frame counts and dimensions modest for faster encoding and a smaller output file.
If a frame needs to be fully transparent in spots, make sure its alpha channel is set below 128 there before uploading.

PNG to Animated GIF Converter