GIF Tools

Render pasted ANSI-colored terminal art (with escape codes) into a downloadable GIF.

Convert a Motion-JPEG AVI video into an animated GIF, using a real, hand-rolled RIFF/AVI parser.

Decode an AVIF image in your browser and re-encode it as a single-frame GIF.

Decode base58 text (Bitcoin alphabet) back into a downloadable GIF file.

Decode a base64 string (or GIF data URI) back into a downloadable GIF file.

Generate an animated GIF that uses exactly two colors, with a marching stripe pattern.

Convert an uncompressed 24-bit or 32-bit BMP file into a single-frame GIF.

Turn an uploaded GIF or a few images into a boomerang: plays forward, then instantly reverses back to the start.

Upload a BPG file to see why client-side BPG decoding isn't possible: BPG wraps HEVC video coding, which no small browser codec provides.

Render pasted Unicode braille-pattern art into a downloadable black-and-white GIF.

Generate a vibrant animated GIF: a scrolling rainbow gradient or cycling color bars, no other input needed.

The full-featured GIF generator: pick canvas size, frame count, delay, loop count, and a content style, then build a real animated GIF.

Decode a data:image/gif;base64,... data URL back into a downloadable GIF file.

Generate a demo GIF showing a gradient reduced to black/white with a visible dither pattern.

Generate the smallest possible technically-valid animated GIF: a single 1x1 fully transparent frame.

Simulate real Conway's Game of Life rules and export the generations as an animated GIF.

Visualize each frame's alpha channel as a grayscale mask: white is opaque, black is transparent.

A comprehensive one-stop report covering a GIF's dimensions, frames, duration, loop count, and transparency.

A quick yes/no check for whether a GIF is actually animated or just a static single frame.

Power-user GIF compression with independent color-count and frame-skip controls.

Merges runs of pixel-identical consecutive frames into one, shrinking frame count without changing the visuals.

One click to make a GIF play at a fixed, opinionated 2x slower speed - no numbers to enter.

One click to make a GIF play at a fixed, opinionated 2x faster speed - no numbers to enter.

Fill a transparent animated GIF's see-through areas with a solid color or another static image, flattening it to fully opaque.

Detect a GIF's background (transparent or solid-corner color) and replace it with a new solid color.

Preview an animated GIF playing live against white, black, checkerboard, and solid-color backgrounds side by side.

Make a chosen color (within a tolerance) transparent across every frame of an animated GIF using simple color-key matching.

Convert every frame of a GIF to pure black and white using a luminance threshold.

Blur every frame of a GIF with an adjustable box-blur radius.

Add a solid-color border of any thickness around every frame of an animated GIF, expanding the canvas so nothing is cropped.

Crop a fixed-thickness border off every frame of an animated GIF, shrinking the canvas back down uniformly.

Brighten or darken every frame of a GIF with a simple adjustable amount.

Change every frame's logical canvas size without scaling its content, anchored at a chosen point.

Cover a rectangular region in every frame of a GIF with a solid block or heavy pixelation.

Remove a green-screen or blue-screen background from an animated GIF, with quick presets for common chroma key colors.

Recolor every frame of a GIF with a hue rotation or a raw RGB channel remap.

Analyze every frame of a GIF and list its most common actual colors.

See which numbered slots of the shared re-encoding palette a GIF's pixels would occupy.

Shuffle a GIF's shared color table for a corrupted-colors glitch look, keeping every pixel's structure intact.

Invert every pixel's colors across every frame of a GIF for a photographic-negative effect.

Remap an animated GIF's colors onto a whole new palette: grayscale, sepia, or your own custom hex colors.

Lists every distinct color actually used across all frames of a GIF, up to 50 shown plus a total count.

Reduce an animated GIF to a small target color count using one shared, consistent palette.

Replace one specific color with another across every frame of a GIF, with an adjustable tolerance.

Embed a real GIF Comment Extension block containing your text into a GIF file.

Overlay one animated GIF on top of another at a chosen position, frame by frame.

Increase or decrease contrast across every frame of a GIF with a simple adjustable amount.

Round the four corners of every frame's canvas in an animated GIF by a chosen radius, masking corners to transparent.

Crop every frame of an animated GIF to the same rectangle, right in your browser.

Reads a GIF's logical screen width, height, aspect ratio, and orientation.

Smooth out dithering noise from every frame of a GIF with an adjustable-strength blur.

Dither every frame of a GIF toward the shared 216-color palette using ordered or Floyd-Steinberg dithering.

Scale down every frame of an animated GIF to exact dimensions using area-average downsampling.

Decode and re-encode a GIF unchanged, producing a clean, re-saved copy for round-trip validation.

Pick an exact total playback duration in seconds and proportionally retime every frame to match it.

Snap stray near-transparent or near-opaque fringe pixels near an animated GIF's edges to fully transparent or fully opaque.

Soften an animated GIF's alpha edges into a smooth gradient fade-out over a chosen feather radius.

Anti-alias jagged, staircase-like alpha edges on every frame of an animated GIF with an edge-aware smoothing blur.

Enlarge every frame of an animated GIF by a percentage scale or an exact target size.

Upload a GIF and prepend new frames that fade in from black before the original animation starts.

Upload a GIF and append new frames that fade to black after the original animation ends.

One-click target-size reduction combining color posterization and frame thinning, more aggressive than the optimizer.

Flip every frame of an animated GIF horizontally, vertically, or both.

Cut a small centered fragment out of every frame of an animated GIF, optionally as a circle.

Insert one or more new still images as extra frames into an existing animated GIF.

Reports exactly how many frames an animated GIF contains.

Burn a visible "N / total" frame-number overlay onto every frame of an animated GIF.

Insert alpha-blended in-between frames into a GIF to smooth out jerky, low-frame-rate animation.

Change a single frame's or every frame's display delay in an animated GIF, in centiseconds.

Duplicate one chosen frame of a GIF a set number of times, in place, then re-encode it.

Extract every frame of an animated GIF (or a chosen range) as individually downloadable PNG images.

Step through an animated GIF one frame at a time with next/previous and play/pause controls.

Randomly shuffle an animated GIF's frame order using cryptographically strong randomness.

Calculates a GIF's effective average frame rate from its frame delay values.

Reorder an animated GIF's frames by typing a new list of original frame indices.

Reduce a GIF's frame count by keeping every Nth frame, while roughly preserving total duration.

Delete specific frames from an animated GIF by index or range, then re-encode it.

Split every frame of an animated GIF into its own separate, single-frame GIF file.

View every frame of an animated GIF as a thumbnail grid, with each frame's index and delay shown.

Set a target frame rate (fps) and convert every frame's delay to the matching constant value.

Convert every frame of a GIF to full-spectrum grayscale, preserving the range of gray tones.

Concatenate two or more animated GIFs, in upload order, into a single combined animation.

Pick an exact target frame count and truncate or loop-extend a GIF's frame sequence to match it.

Sums every frame's delay to report a GIF's total single-pass playback duration in seconds.

Re-encodes a GIF with a new loop count: infinite, or any specific number of repeats.

Reads a GIF's Netscape loop extension to report how many times it repeats.

One-click preset that sets a GIF's loop count to exactly 1, so it plays once and stops.

Animate a typed message as a GIF: a classic letter-by-letter typewriter reveal, or each word flashing in sequence.

Strip comment extensions, extra application extensions, and plain text blocks from a GIF.

Morph one GIF into another using a horizontal displacement warp instead of a plain crossfade.

Combine several uploaded GIFs into one contact-sheet grid GIF, where every cell keeps playing its own source animation.

Overlay an animated GIF's frames on top of a static image background, at a chosen position.

Draw a solid-color outline that hugs an animated GIF's actual silhouette, not just a rectangular frame.

Best-effort removal of a solid-color outline ring near an animated GIF's alpha edge, auto-detecting the color if needed.

Add transparent (or solid-color) padding around every frame of an animated GIF, expanding the canvas without a visible frame.

Crop a fixed amount of padding off every frame of an animated GIF, shrinking the canvas back down uniformly.

Fully hide a rectangular region in every frame of a GIF behind a solid color block.

Pick a frame to freeze on, and this turns an existing animated GIF into a GIF that looks paused there.

Pixelate every frame of a GIF into a chunky mosaic, across the whole frame or one region.

Speed up or slow down a GIF by any multiplier, from 0.25x to 8x, while keeping each frame's relative timing.

One simple quality slider that combines color reduction and automatic dithering into a single control.

Quantize an animated GIF using either the shared uniform-cube palette or a custom median-cut algorithm.

Fit every frame of an animated GIF into a target rectangle, preserving aspect ratio with letterboxing.

Resize every frame of an animated GIF to an exact target width and height.

Reverse an animated GIF's frame order so it plays backward.

Rotate every frame of an animated GIF by 90/180/270 degrees or any custom angle.

Sharpen every frame of a GIF with an adjustable unsharp-mask-style strength.

Shift every frame of an animated GIF by a pixel offset, with optional wraparound.

Shrink every frame of an animated GIF by a percentage scale factor.

Turn every frame of a GIF's subject into a flat, single-color silhouette using its existing transparency.

Reports a GIF's file size in bytes, plus the average size per frame.

Apply a horizontal and/or vertical shear (skew) to every frame of an animated GIF.

Slice a rectangular region out of every frame of an animated GIF, right in your browser.

Upload a GIF and an audio file to see why GIF fundamentally cannot carry sound, no matter how the files are combined.

Add uniform empty space around every frame of an animated GIF, expanding the canvas without a visible frame.

Crop a fixed amount of empty space off every frame of an animated GIF, shrinking the canvas back down uniformly.

Even out inconsistent per-frame delays so a GIF plays at one steady, jitter-free speed.

Split an animated GIF into multiple separate GIF files at chosen frame split points.

Reduce every frame of a GIF to a two-tone stencil cutout based on a brightness threshold.

Add a shape-hugging stroke to an animated GIF with configurable width, color, and inside-vs-outside placement.

Remove a stroke previously added to an animated GIF, mirroring whichever placement (inside or outside) was used to add it.

Apply a radial swirl/twist distortion around every frame's center of an animated GIF.

Burn custom text onto every frame of an animated GIF, with control over position, size, and color.

Burn a real, computed countdown or elapsed-time overlay onto every frame of an animated GIF, based on each frame's actual delay.

Render every frame of a GIF as 24-bit ANSI truecolor terminal art.

Convert an animated GIF into a genuine, playable Motion-JPEG AVI file, hand-built and verified against real AVI tools.

Decode a GIF's first frame and attempt to export it as a still AVIF image, honestly reporting failure if your browser can't encode AVIF.

Encode a GIF file's raw bytes as base58 text (the Bitcoin-alphabet encoding).

Convert a GIF file's raw bytes into a base64 string, for embedding or copy-pasting.

Convert a GIF's first frame into a real, uncompressed 24-bit BMP file.

Upload a GIF to see why client-side BPG encoding isn't possible: BPG wraps HEVC video coding, which no small browser codec provides.

Render every frame of a GIF as Unicode braille-pattern dot-matrix art.

Convert a GIF file into a full data:image/gif;base64,... data URL, ready to paste into HTML or CSS.

Upload a GIF to learn why '.gifv' isn't a real, distinct format, and why that means real client-side encoding isn't possible here either.

Decode a GIF's first frame and attempt to export it as a still HEIF image, honestly reporting failure if your browser can't encode HEIF.

Upload a GIF to see why client-side MKV encoding isn't possible: Matroska is an open container, but real playback still needs a video codec.

Upload a GIF to see why client-side MOV encoding isn't possible here: QuickTime MOV shares MP4's container-vs-codec constraints.

Upload a GIF to see why client-side MP4 encoding isn't possible: MP4 is just a container, and real playback needs a video codec no browser tool can encode.

Tile every frame of a GIF into a single grid sprite sheet image.

Render every frame of a GIF as Unicode shading-block art (space, ░, ▒, ▓, █).

Convert a GIF's first frame into a WebP image.

Upload a GIF to see why client-side WMV encoding isn't possible: WMV needs a proprietary Microsoft video codec no browser tool can encode.

Split an animated GIF into its individual frames, encode each one as a real PNG, and package them into a genuine ZIP archive you can download.

A quick yes/no check for whether a GIF has any transparent pixels at all.

Fill every transparent pixel in a GIF with a solid background color, flattening it to fully opaque.

Make a chosen color transparent across every frame of an opaque GIF.

Reports how many transparent pixels each frame of a GIF has and where they're located.

Apply the corrective shear to straighten an already-skewed animated GIF.

Shrink and letterbox every frame of an animated GIF to restore a wider, zoomed-out view.

Scale up every frame of an animated GIF by a clean integer multiplier (2x-8x).

Burn a semi-transparent text or logo watermark onto every frame of an animated GIF.

Cover a watermark region in every GIF frame by stretching nearby pixels across it, as a best-effort fix.

Upload a GIF and add configurable random noise/static over its existing frames, film-grain style.

Zoom into the center of every frame of an animated GIF, cropping the outer edges.

Upload a '.gifv' file to learn why it's just a renamed MP4/WebM video, and why that means real client-side decoding isn't possible here.

Generate a GIF with animated glitch-art artifacts: RGB channel splits, scan-line shifts, and displaced blocks.

Decode a HEIF/HEIC photo (where your browser supports it) and re-encode it as a single-frame GIF.

Composite a static image on top of every frame of an animated GIF background, at a chosen position.

Convert an interlaced GIF back into standard top-to-bottom row order.

Generate a classic rotating-dot loading spinner GIF with a configurable color and size.

Generate a deliberately low-resolution, heavily posterized demo GIF for testing poor-quality input.

Upload an MKV file to see why client-side MKV decoding isn't possible without a real H.264/HEVC/AV1/VP9 video decoder.

Upload a QuickTime MOV file to see why client-side MOV decoding isn't possible here, and where to find a working alternative.

Upload an MP4 file to see why client-side MP4 decoding isn't possible without a real H.264/HEVC/AV1 video decoder.

Re-encode a GIF's frames in GIF89a's 4-pass interlaced row order for progressive rendering.

Generate a literal 1x1 pixel GIF in a color you choose, or fully transparent, tracking-pixel style.

Turn a PDN checkers/draughts move list into an animated GIF, one frame per move, with real capture and king-promotion handling.

Turn a PGN chess move list into an animated GIF, one frame per move, with a real (simplified) move-applying engine.

Generate a placeholder graphic GIF: centered label text on a solid or checkered background, with an optional shimmer sweep.

Composite every frame of an animated GIF into a classic Polaroid-style photo frame, with a thicker bottom margin and optional caption.

Generate a GIF that looks almost perfectly still but drifts by a couple of color levels over a slow cycle.

Generate a GIF with randomized size, frame count, colors, and pattern, using cryptographically random values.

Generate an animated GIF masked into a perfect circle, transparent everywhere outside it.

Generate a classic marquee GIF where your text scrolls horizontally across the frame in a seamless loop.

Turn an SGF Go game record into an animated GIF, one frame per move, stones accumulating as the game progresses.

Wrap one color fill or uploaded image as a technically-valid single-frame "animated" GIF.

A fun novelty: turns a still image into a GIF that looks static but is technically a very slow animation.

Generate an animated GIF of simple rectangle cards dealing from a deck into a tableau row.

Slice a grid sprite sheet image into equal frames and re-encode them as an animated GIF.

Generate a marching-checkerboard animated GIF on a canvas that's always a perfect square.

Generate an animated GIF masked into a 5-pointed star, with a color-cycling (and optionally rotating) fill.

Renders a smooth, full-24-bit gradient scene and shows exactly how GIF's 216-color palette bands it.

Combine two GIFs into one that plays the first, dissolves into the second, then plays the second.

Render pasted Unicode shading-block art (space, ░, ▒, ▓, █) into a downloadable grayscale GIF.

Generate an animated GIF masked into a wavy, scalloped border shape instead of a plain rectangle.

Convert a WebP image (its first frame, if animated) into a single-frame GIF.

Generate an animated GIF of pure random static, every pixel of every frame is cryptographically random.

Upload a WMV file to see why client-side WMV decoding isn't possible: WMV uses a proprietary Microsoft video codec no browser tool can decode.

Render text with an animated Zalgo-style corruption effect that writhes and changes every frame.