GIF to FLV Converter

How to Convert GIF to FLV Online

1. Upload Your GIF File: Drag and drop or click "Add Files" to select an animated .gif. Batch conversion is supported, so you can queue several GIFs in one session.
2. Pick Quality Preset and Codec: Default is "Very High (Recommended)". Switch to Constant Quality for a fixed visual target, or Constraint Quality to cap bitrate. The video codec defaults to FLV1 (Sorenson Spark / H.263), the original Flash Video codec; alternative encoders such as Flash Screen Video are available for legacy screencast workflows.
3. Set Resolution (Optional): Choose Keep Original to preserve frame dimensions, pick a Preset Resolution (144p through 4320p, default 768p), scale by Resolution Percentage, or enter custom Width × Height (the aspect-ratio fields keep proportions locked).
4. Convert and Download: Click Convert. Files process in your browser session — no sign-up, no watermark, and no Flash plug-in required for the conversion itself.

Why Convert GIF to FLV?

GIF (Graphics Interchange Format) was introduced by CompuServe on June 15, 1987 and uses LZW lossless compression with a palette of up to 256 colors per frame. It has no inter-frame compression, which is why a 10-second 720p animated GIF can balloon past 20 MB. FLV (Flash Video) was Adobe's streaming container and supports modern video codecs — Sorenson Spark (H.263), On2 VP6 (added in Flash Player 8), and H.264 (added in Flash Player 9 Update 3, December 2007) — giving it dramatically better compression than GIF.

Adobe deprecated Flash in July 2017 and ended support on December 31, 2020, so this conversion is now a niche request. It still has real uses:

• Legacy LMS and CMS archives — Older learning-management systems, corporate training portals, and museum kiosks built around Flash 8/9 still expect FLV in their playlist references. Re-encoding archived GIF tutorials to FLV keeps those references resolvable without re-authoring the courseware.
• Forensic and archival preservation — When digitizing a Flash-era project, matching the original container (FLV with FLV1 video and MP3 audio) preserves period-accurate playback inside emulators like Ruffle.
• Embedded device playback — Some industrial signage players, older set-top boxes, and Adobe AIR-based kiosks shipped before 2018 only decode FLV/F4V reliably. GIF-to-FLV gets motion content onto those devices without firmware changes.
• Smaller file sizes than GIF — Even at "Very High" quality, an FLV1-encoded 1080p clip is typically 5-10x smaller than the same animated GIF because it uses block-based motion compensation instead of full-frame palette dumps.
• Streaming over RTMP servers — Self-hosted Wowza, Adobe Media Server, and Red5 deployments still use FLV as their wire format. Converting GIF promos into FLV lets them slot into existing RTMP playlists without transcoding at the server.

For modern web video — HTML5 <video>, social media, messaging apps — convert to GIF to MP4 or GIF to WebM instead. FLV does not play in any current browser without a plug-in.

GIF vs FLV — Format Comparison

Quality Preset Quick Guide

FLV1 (Sorenson Spark) is an H.263 derivative — it lacks B-frames and the in-loop deblocking filter found in H.264, so quality differences between presets are more visible than with modern codecs. If you need a small file with crisp motion, choose H.264 inside the FLV container instead of FLV1.

Frequently Asked Questions

Will any modern browser play my FLV file?

No. Adobe ended Flash Player support on December 31, 2020 and pushed a kill-switch update in January 2021 that refuses to play Flash content. Chrome, Firefox, Edge, and Safari have shipped without Flash since 2020-2021. To play an FLV file today you need VLC, MPV, PotPlayer, the Ruffle emulator (for .swf, partial .flv support), or a custom HTML5 wrapper that transmuxes FLV to MP4 in JavaScript.

Why is the FLV file silent even though it converted successfully?

Animated GIFs do not contain an audio track — the format has no audio specification. The FLV container is created with a video stream only. If you need audio, mux in a separate audio file after conversion using FFmpeg (ffmpeg -i video.flv -i audio.mp3 -c copy out.flv) or convert to MP4 first, where the workflow is simpler.

Should I pick FLV1, H.264, or Flash Screen Video as the codec?

FLV1 (Sorenson Spark, an H.263 variant) is the safest choice for maximum compatibility with old Flash 6-7 players. H.264 inside FLV gives much better quality per kilobyte and works in Flash Player 9 Update 3 (December 2007) and later. Flash Screen Video is purpose-built for screencasts with large flat regions of color — it compresses screen-recording GIFs (terminal demos, UI tutorials) far better than FLV1 but looks worse on photographic content.

My output FLV is bigger than I expected — why?

Two common reasons: the source GIF is short and dominated by key-frames, so inter-frame compression has little to optimize; or the resolution preset upscaled past the GIF's native dimensions. GIFs are often 480p or 360p; encoding them at 1080p multiplies pixels without adding detail. Set Resolution to Keep Original or use Resolution Percentage at 100% to avoid that.

Will the GIF's loop behavior carry over to FLV?

No. GIF stores a Netscape Application Extension that tells viewers to loop indefinitely; FLV has no equivalent metadata flag. Looping is the player's responsibility — set loop=true in your Flash component, or wrap the FLV in an HTML5 <video loop> tag if you re-host it.

Are transparent GIFs supported when converting to FLV?

Not by FLV1 or H.264. The standard FLV codecs do not encode an alpha channel for general use; transparent pixels are flattened against a background color. The "Background Color" advanced option lets you pick what fills those areas (default black). For true alpha-channel video, use a different container — On2 VP6 with alpha was supported in some Flash 8+ builds but is rarely usable today; WebM with VP9 is a better modern target.

How long does conversion take, and is there a file size cap?

Most GIFs under 50 MB convert in 5-30 seconds depending on length and the chosen resolution. xconvert processes files in your browser session, so very large files (multi-hundred MB) may exhaust browser memory on low-RAM devices. Per-tier file size and concurrent-job limits are listed on the xconvert pricing page.

Can I trim the GIF or change its frame rate during conversion?

Yes. The Trim controls let you set start and duration in seconds (or hh:mm:ss.ms). The frame-rate dropdown matches GIF's hundredths-of-a-second timing model — pick from common rates (15, 24, 30 fps) or keep the source rate. Keep in mind that GIF browsers often clamp animation delays below 0.1 s, so a "60 fps GIF" may actually have been playing at 10 fps on the web before conversion.

Should I just convert to MP4 instead?

For nearly every modern use case, yes. MP4 with H.264 is universally supported by browsers, mobile devices, social platforms, and editing software. Use GIF to MP4 for general delivery, GIF to WebM when you want even better compression for the web, or GIF to MOV for Apple ecosystem workflows. Pick FLV only when a specific legacy system requires it.