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NeatUtility

Code Snapshot

Images & Files100% Client-Side
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TEXT
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About this tool, examples & FAQ

Render pasted code as a portable SVG snapshot on a gradient canvas with five code themes, syntax highlighting modes, macOS/minimal/frameless window chrome, four monospace fonts, and fixed-width sizing with aspect-ratio control — entirely in your browser. Download the .svg for blogs, docs, and slides, hit PNG for a crisp 2x raster, or copy the markup straight into HTML. Output is deterministic text, so snapshots are reproducible and never uploaded.

Key facts

Verified capabilities and limits of this utility
Accepted inputSource code or plain text up to 200 KB
Highlighting modesJavaScript, TypeScript, Python, HTML, CSS, JSON, or Plain Text (no guessing — you pick)
ThemesGitHub Dark, GitHub Light, Dracula, One Dark, and Monokai
Frames & fontsmacOS, minimal, or no frame; System Mono, IBM Plex Mono, JetBrains Mono, or Fira Code, 12–24 px
Snapshot canvasSix gradient backgrounds, 480–1400 px width, custom or 16:9 / 4:3 / 1:1 aspect, adjustable spacing
OutputStandalone SVG image (code-snapshot.svg) plus one-click 2x PNG download, copyable as markup
Max input size200 KB
Execution deadline2 s
Processing locationBrowser-only: pasted input is not uploaded

How to use

  1. Paste code into the input pane and pick a highlighting mode for its language (or Plain Text).
  2. Code panel: pick a theme (Monokai included), frame, font, font size, line numbers, title, and inner padding.
  3. Snapshot panel: pick a background, minimum width, aspect ratio, and vertical/horizontal space around the card (the canvas grows for long lines).
  4. Click 'Run' to render the SVG snapshot.
  5. Copy the markup, download code-snapshot.svg, or hit PNG for a crisp 2x raster image for blogs, docs, or slides.

Examples

Snapshot a JavaScript snippet

Input

const greeting = 'hello';
console.log(greeting);

Sample output (illustrative)

Illustrative excerpt; live output is full SVG markup
<svg>…pasted code with hello.js title bar…</svg>

Snapshot code on a light theme

Input

def greet(name):
    return f'hello {name}'

Sample output (illustrative)

Illustrative excerpt; live output is full SVG markup
<svg>…light-theme code, no chrome…</svg>

Edge cases

Long inputs are truncated with a warning

Input beyond 400 lines is cut to the first 400 lines, and lines longer than 200 characters are shortened, each with a visible warning, so the SVG stays a readable image instead of a megapixel-wide file.

The canvas grows to fit long lines

Width is a minimum canvas size, not a clip box: when code needs more room, the canvas expands so every line renders in full. Only lines beyond 200 characters hit the safety cap, with a warning.

Fixed aspect ratios grow for long snippets

Custom height sizes to content. A fixed ratio (16:9, 4:3, 1:1) centers the card in the ratio box, and the canvas grows taller if the code needs more room — the card is never clipped.

Highlighting follows the selected mode

There is no language detection to misfire: JavaScript, TypeScript, Python, HTML, CSS, and JSON highlight per-mode token rules, while Plain Text renders as clean single-color monospace.

Two download flavors from one render

The engine output is standalone SVG markup: infinitely scalable and tiny. The PNG button rasterizes that same render locally at 2x for blogs that only accept pixels — use SVG wherever the host allows it.

Monospace metrics are approximated

Character width is estimated at 0.6 × font size, so exotic glyphs or emoji may measure slightly wider than drawn. Fixed-width code in common monospace fonts aligns as expected.

How it works

  1. Escapes the pasted text for XML, tokenizes each line for the selected highlighting mode, and sizes the card from the minimum snapshot width, spacing, and monospace metrics.
  2. Draws a gradient canvas, then a rounded code card with the selected theme, frame bar, gutter, and per-token colors.
  3. Serializes the whole image as SVG markup and executes inside a Web Worker bounded by the tool deadline.

Related workflows

Frequently asked questions

Why is the output SVG instead of PNG?

SVG is text, so the pure tool engine can generate and test it deterministically without canvas or DOM access. The workspace adds a one-click PNG button that rasterizes the snapshot locally at 2x scale for hosts that only accept pixels — nothing is uploaded either way.

Does it highlight syntax for my language?

Yes — pick the mode matching your snippet: JavaScript, TypeScript, Python, HTML, CSS, JSON, or Plain Text for unhighlighted monospace. The mode is explicit, so highlighting can never misfire on detection.

What can I customize about the snapshot?

Code panel: theme (GitHub Dark, GitHub Light, Dracula, One Dark, Monokai), mode, frame (macOS, minimal, none), font (System Mono, IBM Plex Mono, JetBrains Mono, Fira Code), font size 12–24, line numbers, title, and inner padding. Snapshot panel: gradient background, width 480–1400, aspect ratio, and vertical/horizontal space.

How do I use the snapshot in a blog post?

Download code-snapshot.svg and upload it like any image, or copy the output and paste the markup into HTML. Because the SVG is standalone with inline colors and fonts, it renders without external assets.

Are there size limits?

Input is capped at 200 KB. Rendering truncates beyond 400 lines and 200 characters per line with explicit warnings; shorter long lines simply widen the canvas, keeping every snapshot a readable, reasonably sized image.

References