How do I check a GIF online?

Upload your animated GIF to this GIF analyzer. It reports resolution, file size, frame count, total duration, loop count, and the global color palette. Scrub frame by frame to inspect each delay and disposal method.

How do I view a GIF frame by frame?

After upload, use the frame slider or Play button. Each step shows the composited frame, patch size, x/y offset, delay in milliseconds, disposal method, and whether that frame uses a local color table.

How long can a GIF be?

GIF length is the sum of every frame delay. There is no fixed format limit for duration—practical limits come from file size and memory. This tool shows total duration so you can see how long your GIF actually plays.

Can I extract GIF frames as images?

Yes. Scrub to any frame and click Download frame to save that frame as a PNG. To split a GIF into all frames (PNG or ZIP), use Split GIF. For a full sprite sheet of every frame, use GIF to Sprite Sheet Converter.

Is this a GIF player and GIF viewer?

Yes. You can play the animation step-by-step with original per-frame timing, or scrub manually. The preview shows the fully composited canvas for each frame, not just the raw patch.

How is this different from Shorten GIF or GIF Cutter?

Those tools edit the timeline. This page only inspects—it does not cut, reverse, or re-encode the GIF. Use it to check frames and duration before you trim or convert.

Are files uploaded to a server?

No. gifuct-js parses the GIF locally in your browser. Your file never leaves your device unless you download a frame PNG yourself.

What is the maximum file size?

15 MB per GIF upload. Very large frame counts may be limited by browser memory.

What does disposal method mean?

Disposal tells the decoder what to do after a frame finishes: do not dispose (keep drawing on top), restore to background (clear the patch area), or restore to previous (revert the canvas). Wrong disposal often causes transparency glitches.

Drop GIF here or

Or try an example

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.
Single-frame PNG export
Download any frame as PNG. For bulk gif to frames / ZIP export, use Split GIF.
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.

Upload an animated GIF
Drop or browse a .gif file (15 MB max). Analysis starts automatically.
Review the GIF summary
Check resolution, frame count, total duration, loop behavior, and file size.
Inspect frames one by one
Move the frame slider or press Play to view the GIF frame by frame.
Export a frame if needed
Download the current frame as PNG, use Split GIF for all frames as ZIP, or Shorten GIF 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 here, or use Split GIF when you need the full GIF to frames ZIP.
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.

Debug broken GIFs: Find odd disposal methods, tiny patch frames, or unexpected loop counts causing glitches.
Measure GIF length: Answer “how long is this GIF?” with exact total duration from frame delays.
Prep before trimming: Count frames and note timestamps before cutting with GIF Cutter or Shorten GIF.
Check resolution for social: Confirm GIF pixel size before posting or converting to video.
Extract a single still: Pull one clear frame as PNG. Need every frame as files? Use the Split GIF GIF splitter.
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.