Question 1

Pixel size vs cell size?

Accepted Answer

Larger blocks mean fewer visible details — start small and increase until sensitive content is obscured.

Question 2

Can I pixelate only part of the GIF?

Accepted Answer

This tool applies globally; combine with crop or overlay workflows for region-specific edits.

Question 3

Does pixelation shrink file size?

Accepted Answer

Sometimes — simplified color regions can compress better, but not guaranteed for every source.

Question 4

Retro game look?

Accepted Answer

Downscale plus pixelate mimics 8-bit style; pair with a limited palette export for authentic vibes.

Question 5

Mobile browser performance?

Accepted Answer

Large block sizes compute faster; huge GIFs may stutter on low-end phones during preview.

Question 6

Private?

Accepted Answer

Yes — frames never leave your browser.

Question 7

Why is in-browser GIF processing slower than online editors?

Accepted Answer

Server-side editors run on dedicated CPUs with native code paths and parallel workers. Our GIF engine decodes every frame with gifuct-js and re-encodes with gifenc — both pure JavaScript libraries running single-threaded inside your browser tab, which is typically 2–5× slower than a backend pipeline. The trade-off is total privacy: your GIF is never uploaded, never logged, never stored on any third-party server. Closing the tab erases everything from memory immediately. For most short loops the wait is small, and for sensitive material — work captures, dashboards, private screen recordings — the privacy gain is well worth the few extra seconds.

Question 8

Is my GIF uploaded to a server?

Accepted Answer

No. Everything runs entirely inside your browser tab using gifuct-js for decoding, the HTML5 Canvas API for pixel work, and gifenc for re-encoding. The file is decoded into local memory only, processed in the same tab, and the result is offered as a direct download. Nothing is transmitted to any server, no account is required, no analytics are tied to your file, and closing the tab discards every byte from memory.

Question 9

How big a GIF can I process?

Accepted Answer

Up to 50MB and roughly 16 megapixels per frame, with a soft cap of about 600 frames. The limit exists because every frame needs to fit inside your tab's memory as full-resolution RGBA pixels (four bytes per pixel). Most short loops, screen recordings, and reaction GIFs sit comfortably under that ceiling. If your GIF is larger, run the GIF Compressor or GIF Frame Skipper first to bring it down before applying further effects.

Question 10

How are colours quantized in the output?

Accepted Answer

gifenc builds a fresh palette per frame using a wu-quant algorithm with up to 256 colours. This keeps colour-shifting effects (fades, glitch, brightness) accurate even when the source palette was tiny. You can lower the colour count in the Color Reducer / Compressor / Lossy Compressor tools to trade colour fidelity for smaller files.

Question 11

Are transparent backgrounds preserved?

Accepted Answer

Yes — gifuct-js gives us a per-frame alpha channel from the original GIF's disposal data, and we composite frames into RGBA buffers so transparency survives every effect. When you re-encode, gifenc writes a 1-bit transparent palette index whenever the source alpha was zero, so transparent regions remain transparent in the output.

Question 12

Does the loop count carry over?

Accepted Answer

Yes — when the source GIF declares a loop count via the NETSCAPE2.0 application extension, we read it during decoding and write the same value into the output container. If the source has no loop block (a one-shot GIF), the output also plays once. Tools that explicitly let you change loop behaviour (Loop Editor, Boomerang, Player) override this and write whatever loop count you choose.

Question 13

Which browsers are supported?

Accepted Answer

Recent Chrome, Edge, Firefox, Safari, and other Chromium-based browsers all work. The tool only relies on the standard HTML5 Canvas API, ArrayBuffer, and Blob URLs, all of which have been universally supported for over a decade. Mobile browsers work too, although large GIFs may take noticeably longer because phone CPUs are weaker than desktop CPUs.

Question 14

Is there a watermark or sign-up wall?

Accepted Answer

No. The tool is completely free, requires no account, attaches no watermark, and shows no popup ads on your output. A small fair-use throttle runs in the background to discourage automated abuse, but it does not affect normal one-off conversions. The downloaded GIF is exactly what gifenc wrote out from your edited frames — nothing more, nothing less.

Question 15

Does Favtoo keep a copy of files I process with GIF Pixelate?

Accepted Answer

Favtoo keeps no copy of your file because Favtoo never receives your file. GIF Pixelate runs entirely in your browser, the input is held only in your tab's memory, and closing the tab discards it. There is no opt-in cloud history, no "recent jobs" panel synced to an account, and no server-side retention to configure — the architecture simply has nowhere for your file to be stored.

Question 16

Will I notice a difference in the output from GIF Pixelate?

Accepted Answer

GIF Pixelate is built to preserve quality wherever the underlying image format allows it. Operations that are mathematically lossless (e.g. structural transformations, lossless re-encoding) round-trip with no perceptible change. Operations that involve a lossy codec inevitably introduce small artefacts at the byte level, but the defaults aim at the sweet spot where output looks or sounds the same to a normal viewer or listener while still being meaningfully smaller or faster than the input.

Question 17

How is GIF Pixelate different from desktop apps that do the same thing?

Accepted Answer

Desktop apps usually have more advanced features but require installation, maintenance and (often) a licence. Paid online tools are convenient but route your file through their servers and gate downloads behind accounts. GIF Pixelate sits in between: free, instant, and private, but intentionally narrow in scope. For one-off jobs and the common image editing and conversion operations, it is usually the lowest-friction choice; for highly specialised work, a dedicated app is still the right answer.

Question 18

Does GIF Pixelate upload my file to a server?

Accepted Answer

Your file is processed inside your browser by standard browser APIs. The engine reads the file's bytes from your tab's memory, computes the result, and writes the result back into the tab. You can confirm what the page does by opening developer tools and watching the Network tab during a run — the requests you see are for the tool's static assets only.

Question 19

What does the error message in GIF Pixelate mean?

Accepted Answer

Failures usually fall into one of three buckets: the input is in an unsupported format, the input is over the size cap, or the input is structurally malformed (a truncated download, a partial export, or a stream the engine does not recognise). The first two are easy to confirm — check that your file is one of GIF and that it is below 50 MB. For the third, opening the file in its native viewer first is the fastest way to confirm the source is intact.

Question 20

Can I use GIF Pixelate for commercial work?

Accepted Answer

GIF Pixelate can be used for personal and commercial work alike — there is no separate "business" licence to purchase. The output you generate is yours to use however you want, including in client deliverables, internal documents, or commercial products. Favtoo's only ask is fair, individual use; the tool is not designed to be embedded as a backend service or wrapped behind an API for resale.

Question 21

How long does GIF Pixelate take to process a file?

Accepted Answer

Most jobs finish in seconds. Speed scales with input size and with how many CPU cycles your browser tab has available — the engine runs in your browser, so it shares resources with whatever else you have open. For inputs near the 50 MB ceiling, expect anywhere from a few seconds to roughly a minute on a typical laptop. Closing other heavy tabs noticeably speeds things up.

Question 22

What input formats are supported by GIF Pixelate?

Accepted Answer

GIF Pixelate accepts GIF. If your input is in a format that is not directly supported, convert it first using one of Favtoo's converter tools — every Favtoo converter outputs a file that is a clean input to the next tool in the chain.

Question 23

Can GIF Pixelate run inside a corporate firewall?

Accepted Answer

GIF Pixelate is a static page running an open-source engine in your browser, so a typical corporate firewall does not get in the way as long as it allows JavaScript to load from Favtoo. For teams that need to host it themselves on an internal network, the underlying engine (standard browser APIs) is open-source and can be packaged into a private build with the same behaviour. Reach out via the Contact page if that is something you are exploring.

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