GIF Speed Changer Speed up or slow down animated GIF files by adjusting the frame delay timing.

What Is GIF Speed Changer?

A GIF speed changer that adjusts animation timing by modifying frame delays. Set a speed multiplier to make animations faster or slower. The tool decodes the GIF, divides each frame delay by the speed factor, and re-encodes with the new timing. A 2× multiplier halves all delays (faster), while 0.5× doubles them (slower). Preset buttons provide quick common speeds.

Why Use GIF Speed Changer?

• Precise speed multiplier from 0.25× to 5×
• Quick presets for common speeds
• Side-by-side original vs modified preview
• Frame-accurate timing adjustment

Common Use Cases

Social Media

Speed up slow GIFs for snappier social media posts.

Tutorials

Slow down fast animations so viewers can follow along.

Memes

Create dramatic slow-motion or comically fast GIF effects.

Presentations

Adjust demo GIF speed to match presentation pace.

Technical Guide

The GIF is fully decoded using a custom GIF89a parser that extracts frames with their original delays. The speed multiplier divides each frame delay: delay_new = delay_original / speed. A minimum delay of 20ms is enforced (GIF spec minimum). Frames are then re-encoded with updated graphic control extensions containing the new delay values. LZW compression and color quantization are applied during re-encoding.

Tips & Best Practices

• 1
  Start with 2× for a noticeable speed increase
• 2
  Use 0.5× to study fast animations frame by frame
• 3
  Combine with GIF Resizer for optimized output
• 4
  Very fast speeds (5×) may appear choppy due to display limits

Related Tools

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Frequently Asked Questions

Q Speed range?

From 0.25× (quarter speed) to 5× (five times faster).

Q Quality loss?

Re-encoding involves color quantization which may slightly change colors.

Q Per-frame delays?

All frame delays are scaled uniformly by the multiplier.

Q Minimum delay?

20ms minimum — browsers ignore shorter delays anyway.

Q File size change?

Speed changes alone don't significantly affect file size.

About This Tool

GIF Speed Changer is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.