Overview
Introduction
This tool burns custom text onto every frame of an animated GIF, entirely client-side, using a built-in bitmap font.
Because the same text is stamped identically onto every frame, the result reads as a stable caption layered over the moving animation, similar to a meme caption or watermark.
What Is GIF Text Adder?
A client-side GIF text-stamping tool that decodes an uploaded animation and, for every frame, draws the requested text at a chosen pixel position, size, and color using a hand-authored 5x7 bitmap font covering uppercase letters, digits, and basic punctuation.
It's the category's shared text-rendering building block: the Polaroid GIF Creator's caption and the GIF Timer Adder's computed overlay both reuse the same underlying font and drawing function.
How GIF Text Adder Works
The requested text is uppercased and walked character by character; each recognized character looks up its 5x7 glyph pattern and stamps filled pixels (scaled by the chosen integer scale factor) onto the frame at the current cursor position, then the cursor advances by the glyph width plus spacing.
The exact same operation runs independently on every frame using the same text, position, scale, and color, then the frames are re-encoded into a single animated GIF with their original delays and loop count preserved.
When To Use GIF Text Adder
Use it to add a meme-style caption, watermark, or label to an animated GIF before sharing it.
It's also useful as a lightweight way to label a set of demo or tutorial GIFs consistently.
Often used alongside GIF Timer Adder, Polaroid GIF Creator and GIF Background Adder.
Features
Advantages
- Works entirely without a browser canvas or system fonts, since the font is built directly into the pure lib function.
- Applies identically to every frame, keeping captions perfectly stable throughout playback.
- Runs entirely client-side; the uploaded animation is never sent to a server.
Limitations
- Limited character set (uppercase A-Z, 0-9, and a few punctuation marks): lowercase is uppercased and unsupported characters are skipped.
- No text wrapping: long strings simply run off the edge of the canvas rather than wrapping to a new line.
Examples
Best Practices & Notes
Best Practices
- Keep text short and check it fits within the frame's width at your chosen scale before finalizing.
- Choose a text color with strong contrast against the frame's typical background for legibility.
- Use a consistent position and scale across a batch of related GIFs for a uniform look.
Developer Notes
addTextToGif in gif-text-adder.ts exports GIF_FONT (the 5x7 glyph map), drawTextOnFrame, and measureText, all reused directly by polaroid-gif-creator.ts (for its caption band) and gif-timer-adder.ts (for its computed time labels): the font and rendering logic are authored once in this file rather than duplicated across every text-producing tool in the category.
GIF Text Adder Use Cases
- Adding a meme-style caption or label to an animated GIF before sharing
- Labeling a batch of tutorial or demo GIFs consistently
- Building a simple watermark overlay for animated content
Common Mistakes
- Expecting lowercase letters or accented characters to render distinctly: the font only covers uppercase A-Z, 0-9, and basic punctuation.
- Placing text near the frame's edge at a large scale, causing it to run off the canvas.
Tips
- Use the GIF Timer Adder instead if you want a computed, per-frame-changing label rather than static text.
- Combine with the Polaroid GIF Creator if you want the text placed in a dedicated caption band rather than directly over the animation.