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Inspect animated GIF structure: resolution, frame count, total duration, loop count, per-frame delay, disposal method, and color palette—all in your browser.

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GIF analyzer — inspect frames, duration, and resolution

Free GIF analyzer and GIF viewer: check GIF frames frame by frame, see resolution, duration, loop count, and palette—extract frames as PNG in your browser.

What is a GIF analyzer?

A GIF analyzer is an animated GIF viewer and checker that inspects how a GIF is built. Upload a file to see logical screen resolution, total frame count, how long the GIF plays, loop metadata, the global color palette, and a frame-by-frame breakdown with delays, patch offsets, and disposal methods. Creators use it to debug transparency glitches, measure duration before trimming, and extract still frames—without re-encoding the animation. This tool runs entirely in your browser with gifuct-js; nothing is uploaded to a server.

GIF analyzer features

Inspect animated GIFs frame by frame in the browser.

  • Frame-by-frame viewer

    Scrub or play every animated GIF frame with original delay timing.

  • Duration & loop check

    See total play time, average delay, and Netscape loop count at a glance.

  • Resolution readout

    Logical screen width × height plus per-frame patch size and offsets.

  • Disposal & palette

    Inspect disposal methods, local vs global color tables, and hex palette swatches.

  • GIF frame extractor

    Download any single frame as a PNG for editing or debugging.

  • Private GIF checker

    All analysis runs client-side—no server upload.

How to analyze a GIF online

Steps to check GIF frames, duration, and resolution.

  1. Upload an animated GIF

    Drop or browse a .gif file (15 MB max). Analysis starts automatically.

  2. Review the GIF summary

    Check resolution, frame count, total duration, loop behavior, and file size.

  3. Inspect frames one by one

    Move the frame slider or press Play to view the GIF frame by frame.

  4. Export a frame if needed

    Download the current frame as PNG, or continue to /shorten-gif if you need to trim.

Tips for checking GIFs

Get clearer answers when analyzing animated GIFs.
  • 01

    Watch disposal on transparent GIFs

    Restore-to-background vs do-not-dispose often explains leftover pixels between frames.

  • 02

    Use duration before cutting

    Note total length, then trim by time in /gif-cutter or by frame number in /shorten-gif.

  • 03

    Check average delay for stutter

    Wildly uneven per-frame delays can make playback feel uneven even at a steady “FPS.”

  • 04

    Local color tables add size

    Frames marked with a local color table can inflate file size—worth auditing when optimizing.

  • 05

    Export key poses as PNG

    Download individual frames for thumbnails or still posts without converting the whole GIF.

  • 06

    Large GIFs need more memory

    High frame counts decode every composited buffer—prefer desktop for huge files.

GIF analyzer tools compared

How this free GIF viewer and checker stacks up against other options.

  • Ezgif.com Analyzer

    Popular animated GIF analyzer with frame breakdown and palette extraction. Requires server upload.

  • GIFBrewery / desktop apps

    Desktop GIF makers often include inspectors, but need install and are heavier for a quick check.

  • Browser DevTools

    Can preview a GIF file but rarely expose disposal methods, loop counts, or per-frame patch offsets.

  • Online “GIF info” utilities

    Many show only width, height, and size—without frame-by-frame playback or disposal details.

  • GIF Analyzer (this tool)

    Browser-only GIF checker: duration, loop, frame viewer, palette, disposal, and PNG frame export—no upload.

Perfect for these uses

When you need to check or understand an animated GIF.

  1. Debug broken GIFs: Find odd disposal methods, tiny patch frames, or unexpected loop counts causing glitches.

  2. Measure GIF length: Answer “how long is this GIF?” with exact total duration from frame delays.

  3. Prep before trimming: Count frames and note timestamps before cutting with /gif-cutter or /shorten-gif.

  4. Check resolution for social: Confirm GIF pixel size before posting or converting to video.

  5. Extract a single still: Pull one clear frame as PNG without converting the whole animation.

  6. Audit color tables: See global palette colors and which frames use local color tables.

Why use this GIF analyzer

Advantages of a browser-based GIF viewer and checker.

  • Instant structure view

    Frames, delays, and metadata appear as soon as the file parses.

  • True composited preview

    Each frame shows the full canvas after disposal—what players actually display.

  • No install

    Works in desktop and mobile browsers without desktop GIF software.

  • Private by default

    Your GIF stays on your device during analysis.

  • Free

    Unlimited checks and frame downloads without watermarks.

  • Fits the GIF toolkit

    Pair with resizer, cutter, reverse, and converters on the same site.

Technical details

How client-side GIF analysis works.
GIF decode
gifuct-js parses the GIF header, global color table, and decompresses every frame patch.
Frame compositing
Patches are blitted onto a logical-screen canvas with disposal types 2 and 3 applied.
Loop metadata
Netscape application extension is read when present (0 = forever).
Frame export
Current composited frame is written to Canvas 2D and downloaded as PNG.
Input format
Animated or static GIF (.gif) only.
Limits
15 MB max upload; frame count limited by browser memory.

Sources & References

Authoritative references on the GIF format, frame timing, and the Canvas API used for frame export.
  • “The Graphics Interchange Format is a bitmap image format that supports up to 8 bits per pixel, allowing a single image to reference a palette of up to 256 distinct colors.”
    — Wikipedia — GIF

    GIF format and animation: This analyzer inspects GIF logical screen size, frame patches, delays, color tables, and disposal methods within that frame-based animation model. en.wikipedia.org/wiki/GIF

  • “Frame rate is the frequency at which consecutive images are displayed in an animated display.”
    — Wikipedia — Frame rate

    Frame rate in animated displays: Total GIF duration is computed by summing per-frame delay values—the timing metadata that controls effective playback speed. en.wikipedia.org/wiki/Frame_rate

  • “The Canvas API provides a means for drawing graphics via JavaScript and the HTML canvas element.”
    — MDN Web Docs — Canvas API

    Canvas API (client-side frame export): Frame previews and PNG downloads are rendered with Canvas 2D entirely in the browser after gifuct-js decompression. developer.mozilla.org/en-US/docs/Web/API/Canvas_API

  • “PNG supports lossless data compression, making it useful for storing graphics that need to be edited repeatedly without losing quality.”
    — W3C — PNG Specification (overview)

    Graphics Interchange Format specification context: Exported still frames use PNG so individual GIF frames can be saved losslessly for editing outside the animation. w3.org/TR/PNG/

Frequently Asked Questions

Quick answers about this tool—open a question to read more.