A GIMP YouTube thumbnail comes down to three decisions: the canvas size, the outlined text, and the export. Set a 16:9 canvas at YouTube's recommended size, type the words with the GIMP 3 Text tool set to Outlined and filled, and export a JPG or PNG under the upload limit. Before GIMP 3 the text tool had no outline setting, which is why the tutorials exist. As of September 2026, YouTube's Add custom thumbnails page says to have a resolution of 3840 by 2160 pixels for videos and 2160 by 3840 for Shorts, with a minimum width of 640 pixels for videos, so the canvas has a fixed answer.
Below: the canvas, the photo, the words and the export in GIMP 3, then the line between the tools: GIMP to move every pixel and own the file, a generator for the finished image from a reference and your words. For a free browser design tool that starts from templates, see what the Kittl free plan gives a thumbnail.
What GIMP is, and is not, for a thumbnail
This section places GIMP on the map before you open it. On its home page GIMP calls itself the free and open source image editor, points to the GPLv3 as its license, and runs on GNU/Linux, macOS and Windows. As of September 2026, the newest release listed on gimp.org is GIMP 3.2.6. There is no price, only a donation link, and no AI feature named on the page: no background remover, no generate button, no prompt box. GIMP is a layers editor in the family of Photoshop and Affinity, and the free desktop pick in how to make a YouTube thumbnail without Photoshop.
GIMP gives you a canvas, layers, selection tools, a text tool and an export dialog, and then it waits. You decide where the face goes, how big the words are and what color the ground is, three of the seven in how to make a YouTube thumbnail, and in GIMP all seven are yours. For a creator who wants to own the file and place every pixel, that is the point. For one who wants a finished image before dinner, it is the cost.
The downloads page lists builds for Windows (x86_64, ARM64 and a Microsoft Store version), macOS (Intel and Apple Silicon) and Linux (AppImage, Flathub, Snap Store), and says the GIMP team provides no package on Apple's App Store. On a Mac, take the installer from gimp.org.
The canvas: a new image at YouTube's size
This section sets the canvas; the number is a YouTube question, not a GIMP one. YouTube's Add custom thumbnails page, read in September 2026, says to have a resolution of 3840 by 2160 pixels for videos and 2160 by 3840 for Shorts, with a minimum width of 640 pixels for videos, and to try to upload a thumbnail with an aspect ratio of 16:9 for videos and 9:16 for Shorts. The shape matters most; the pixel count is a recommendation, and YouTube re-encodes every upload anyway.
- Open File > New. Type 3840 for the width and 2160 for the height, in pixels. The fill can be white or transparency. The resolution fields relate mainly to printing, the GIMP manual says, and change nothing on YouTube.
- For a Short, make a second canvas. 2160 wide and 3840 high. Do not rotate the landscape file; everything sits differently in a tall frame.
- Save the project at once. File > Save writes an .xcf, GIMP's own format, with the layers intact. Export, later, writes the flat JPG or PNG. Keep both.
A smaller canvas is legal: 1920 by 1080 is above the 640 pixel minimum and lighter on an older laptop. But YouTube's Thumbnail and title tips page, read the same month, says thumbnails show up differently across devices, so make sure your thumbnail image is as large as possible. Start at the full size unless the machine complains.
The photo: open it as a layer and cut yourself out
This section puts you on the canvas, which is where the time goes. File > Open as Layers adds your photo to the top of the layer stack at its own pixel size, so a phone photo lands larger than the canvas. Layer > Scale Layer brings it down; aim for your face at about a third of the frame's width, big enough for a phone and small enough to leave room for three words. The Move tool then puts you on the right, so the words get the left.
Then the cut-out. The Foreground Select tool asks for a rough loop around yourself, then a stroke through the parts that are you, and it works out the edge. The GIMP manual says it works best on an object that is easy to distinguish from the background: a plain wall is two passes, a shelf behind your head is a long stretch of chasing strays with the eraser. So the cheapest decision happens before you open GIMP: shoot against a plain wall. When the selection is right, Layer > Mask > Add Layer Masks, initialized from Selection, hides everything outside it.
Then the ground: a new layer below the photo, filled with one solid color. Dark navy under a warm face, pale gray under a dark jacket; the rule is contrast, you against the ground and the ground against the words. For this post's example, a review of an old laptop, you hold it up on the right on a deep blue ground.
The words and the outline in GIMP 3
This section is the one the outline tutorials are written for, and in GIMP 3 the answer is short. Pick the Text tool, click on the canvas, and type. The tool options give you the font, the size, the color, and a Style setting with three choices: Filled, Outlined, and Outlined and filled. The GIMP 3 manual describes Outlined as painting the edges of each character and leaving the inside transparent, and Outlined and filled as the two together, with a Line width that sets the width of the text outline. Set Outlined and filled, white fill, black outline, a line width around a tenth of the font size, and the words sit on any ground.
The older method still works and is what older tutorials teach: Layer > Text to Path (the GIMP 3 manual: a path from the outline of each selected text layer), then a selection from the path, grown by a few pixels and filled with black on a layer below. It was the workaround for a text tool with no outline: the GIMP 2.10 manual lists no Style among the tool's options. If a tutorial turns the text into a path before it can stroke it, check its date.
What you type matters more than how you stroke it. One line, three or four words in capitals, and the heaviest weight the font family offers. The best font for YouTube thumbnails is a weight, not a name, and a thin outline around a thin font is two thin things. As of September 2026, YouTube's Thumbnail and title tips page says that if you add text, make sure to use a font that's easy to read. The outline is insurance for where the ground changes under a letter.
The same outline, as a brief
- Words. STILL WORTH IT? on one line.
- Instructions. Me on the right holding up an old laptop, deep blue ground, thick white text with a black outline, one line.
Export: JPG or PNG, under the desktop limit
This section gets the file out, and the trap is that Save is not Export. File > Save writes an .xcf, which YouTube does not take. File > Export As writes the flat image: end the name with .png or .jpg, or pick the format under Select File Type in the dialog. As of September 2026, YouTube's Add custom thumbnails page says to upload image formats such as JPG or PNG, and the same page also says the limit is 50MB for video, Shorts, and podcast thumbnails from desktop, and 2 MB for video thumbnails from mobile.
PNG is lossless and larger: a full-size PNG with a photo in it can pass the mobile limit while staying far under the desktop one. JPG is smaller; the GIMP manual puts the default quality at 85 and says values above 95 are generally not useful. Keep it at the default or a little above; a hard black outline around white letters is where JPG artifacts show first. Do not scale the image down to make it lighter; if a finished thumbnail looks soft on the watch page, why is my YouTube thumbnail blurry works through the causes in order.
Then keep the .xcf. The next episode is the same file with the photo layer swapped and the words retyped, and the channel keeps one look.
Where GIMP stops and a generator starts
This section draws the line by what you want to do, not by which tool is better. GIMP is for moving pixels. If you want to nudge the outline one pixel and own the layered file, nothing competes, and it is free. The cost is hours: a first thumbnail by hand is an afternoon, most of it on the cut-out. Among the tools YouTubers use to make thumbnails, GIMP sits with the full editors, beside template tools, paid designers and AI makers.
A generator is for getting an image. In WThumb you paste a YouTube link or upload a reference image, type up to three lines of words and one line of instructions, and wait about thirty seconds. There is no canvas, no layers and nothing to move; the trade is control for time. Whether you need the canvas at all is the question in do you need a thumbnail editor, or a generator.
The two hand off: the GIMP export can be the next thumbnail's reference. In WThumb the reference is a brief, not a template: the subject, the visual idea, the energy and the role of each element carry over, and the layout, framing, typography and color treatment are designed fresh. One limit: there is no .xcf support in WThumb, which takes PNG, JPEG or WebP, so upload the exported JPG, not the layered project.
One thing does not change. As of September 2026, YouTube's thumbnails policy page lists what a thumbnail must not show, including a thumbnail that misleads viewers to think they're about to view something that's not in the video. STILL WORTH IT? on a laptop you never switch on is a problem in either tool.
How to do this in WThumb
This section makes the same laptop thumbnail from a brief, with the GIMP export as the reference.
- Upload the reference or paste the link. The JPG from GIMP, or the last episode's YouTube link; WThumb fetches only that video's public thumbnail. The reference is a brief: the idea carries over, the design is new.
- Type the words and one instruction line. Up to three lines, so STILL WORTH IT? on one line, plus one plain line: me on the right holding up an old laptop, deep blue ground, thick white outlined text.
- Add your photo, or leave it out. With a photo, you are placed in the design. Without one, the person in the reference is removed and the space filled in the same style. Nobody else's face is ever put in.
- Tick the formats and the count. 16:9, 9:16 or both in one submission, and one or two designs from the same brief. Wait about thirty seconds.
- Download the JPEG. Full HD+, above YouTube's minimum width and below its recommendation, and YouTube re-encodes it anyway.
Ask for the outline instead of building it
The Line width setting in GIMP becomes a phrase here: thick white text with a black outline, one line. It goes in the instruction line, not the words. There is no font picker or stroke slider in WThumb; the instruction is the whole control.
Revise it if the weight came back thin
After the thumbnail finishes, the pencil on it starts a revision. If the words came back thin, describe one change in plain words (thicker white text with a black outline) and a new version is made; each revision costs one credit (1 credit = 1 thumbnail). The first two runs cost nothing: new accounts get two free credits, no card needed.
GIMP gives you every pixel and asks you to place all of them. A generator gives you the finished image and asks you for the idea. Both are free to start.
