Random Avatar Generator accepts a name or short label and returns a square PNG in exactly 128, 256, or 512 pixels, drawn as either a circle or a rounded square with one or two centered white initials on a randomly chosen dark background, and the entire workflow runs locally in the browser tab with no upload. This cheat sheet collects every fixed parameter, every normalization rule, and every download detail in one place so a reader can confirm settings at a glance without re-reading long documentation. The rest of the article condenses the tool's verified behavior — initials extraction, whitespace handling, palette selection, shape geometry, filename construction, error handling, and the limits of what the tool intentionally does not produce — into a single reference. Use it next to the actual generator to verify input choices before creating or re-running an avatar.
Cheat Sheet at a Glance
Every parameter the Random Avatar Generator exposes is fixed to a small, well-defined set. The table below captures the full surface area — what is allowed, what is constant, and what is auto-generated — so the controls do not have to be re-discovered by reading the page each time.
| Setting | Allowed Value |
|---|---|
| Output size | 128, 256, or 512 pixels (always square) |
| Shape | circle or rounded-square |
| Background palette | One of eight fixed dark colors, selected at random |
| Initials | First character of the first word; first character of the last word if present |
| Foreground | White, centered, system sans-serif font sized to the canvas |
| File type | PNG with transparent corners around the chosen shape |
| Filename | Lowercased ASCII letters and digits from the label, hyphenated, plus "-avatar.png" |
| Processing location | Current browser tab only — no server round-trip |
Initials Rule and Whitespace Handling
The initials derivation is fully deterministic for a given input. The first Unicode character of the first word is always taken. If a second word exists, the first Unicode character of that last word is also taken. Any middle words between them are skipped, so a label like "Alex Q. Morgan" still maps to AM. Surrounding and repeated whitespace is ignored, which means " Alex Morgan " produces the same result as "Alex Morgan".
Empty input does not produce a blank image. The preview substitutes a single question mark so the download is never silent or ambiguous.
| Input | Initials Shown |
|---|---|
| Alex Morgan | AM |
| Alex | A |
| Alex Q. Morgan | AM |
| Morgan | M |
| (empty) | ? |
| José | J |
Uppercasing is bounded after character extraction. Some letters can expand into multiple code points when uppercased — the Eszett is the classic example — so the tool keeps only the first resulting code point from each selected word. That rule prevents an unusual name from overflowing the intended one-or-two-initial design while preserving common accented initials such as José or Ángela. Complex emoji sequences and script-specific casing can still render differently across system fonts, so the visual result should be reviewed at the destination.
Output Sizes, Shapes, and Transparency
The output canvas is always square, and the size is restricted to three practical values. Each value is a raster dimension in pixels, not a print measurement, and the file does not carry DPI, color-profile, EXIF, ownership, or identity metadata. The downloadable canvas remains at exactly the selected size even though the on-page preview is scaled to fit its container.
| Shape | Geometry | Transparency |
|---|---|---|
| circle | Fills the canvas; the circle touches all four edges | Outside the circle is fully transparent |
| rounded-square | Fills the canvas; corner radius equals 16% of the canvas size | Outside the rounded square is fully transparent |
Both shapes use the selected background as a flat fill, draw the white initials centered with a font size proportional to the canvas, and rely on the browser's system sans-serif font for letter shapes. The MDN Canvas 2D API reference describes the fill, font, and text alignment calls that produce this rendering.
How to Generate an Avatar in Three Steps
Open the Random Avatar Generator, then follow the three-step workflow below.
- Enter a name or short label, choose a size from 128, 256, or 512 pixels, and pick circle or rounded-square.
- Click the random color control until the chosen dark background fits the intended use, then click Create avatar.
- Inspect the local preview at its scaled display size and download the PNG at the exact raster size selected in step one.
Changing the name, size, or shape invalidates the previous preview so the canvas never shows a stale image. A new asynchronous PNG export cannot overwrite a newer job, and replaced Object URLs are revoked. Together those guards prevent the wrong preview from being downloaded when settings are adjusted quickly.
Filename Pattern and Download Behavior
Downloaded file names are constructed deterministically from the entered label. The tool extracts every lowercase ASCII letter a–z and digit 0–9, joins them with hyphens, and appends "-avatar.png". A label of "Alex Morgan" therefore becomes alex-morgan-avatar.png, while "Project 42" becomes project-42-avatar.png. Non-ASCII characters in the label are stripped from the filename but still render in the initials, because filename safety and rendered text are handled separately.
If nothing safe remains — for instance, an emoji-only label — the filename falls back to avatar-avatar.png. Invalid dimensions, unsupported shapes, malformed palette entries, unavailable canvas support, missing secure randomness, and failed PNG encoding all raise explicit errors instead of producing a corrupt download, so a failed export is loud rather than silent.
Privacy, Limits, and What the Tool Does Not Do
The Random Avatar Generator runs entirely in the current browser tab. Initial extraction, palette selection, drawing, preview, and download creation all happen locally, and no name, label, or image is uploaded to a server. No profile is stored, no person is searched, and no biometric likeness is created. The tool does not generate a face, photograph, identicon hash, QR code, NFT, social-media account, or AI portrait.
Because the initials and palette are the only two signal channels, the result is a visual product choice and not a claim about identity, gender, ethnicity, organization, or brand. For a batch of avatars built from the same rules, the bulk version of the generator walks through the same logic across many names.
Common Pitfalls and Quick Fixes
Two visual artifacts are predictable enough to plan around. First, system font rendering differs across operating systems, so the same initials can look subtly different between a Mac, a Windows machine, and a Linux server. An avatar should be reviewed at its actual destination size rather than assumed to match the preview exactly. Second, very small UI placements — favicon-like uses, list-row avatars, comment threads — can compress two initials into something hard to read, while a 512-pixel file does not add typographic detail beyond the browser's chosen system font.
For brand assets that need accessibility-reviewed color systems, vector originals, exact cross-platform typography, or a strict typographic hierarchy, a dedicated design tool with an approved brand font is the right choice. The MDN Crypto.getRandomValues reference documents the source of the random palette selection.