Documenting the steps you use to generate an SVG blob means writing down the exact inputs you fed the generator — vertex count, irregularity, canvas size, fill color, and the displayed seed — together with the markup that came out of it, so the same organic shape can be rebuilt later by anyone with the same notes. The SVG Blob Generator is built around this idea: the same vertices, irregularity, size, color, and unsigned 32-bit seed always produce the same path data, the same coordinates rounded to two decimal places, and the same single-path SVG document. That determinism is what makes a written record useful. Without the seed, your notes describe a class of similar shapes but cannot pin one down; with the seed, your notes pin down a specific shape. This article walks through what to record, in what order, and how to verify that the record actually reproduces the blob you intended.
Documentation matters because the blob is not a named shape, a CSS primitive, or a stock graphic. It is decorative geometry generated from a small set of explicit controls, and the only way to bring it back is to capture those controls. The tool does not store anything server-side, so the record lives wherever you put it — a code comment, a design file note, a spreadsheet, a runbook, or the body of a pull request. Treat that record as the canonical source of truth for the blob and treat the downloaded SVG as a checkpoint you can re-derive from the record.
Why the Generator Makes Documentation Practical
The reason this documentation problem is solvable at all is the seeded, deterministic design. The tool starts at evenly spaced angular vertices around the canvas center, varies the radius assigned to each vertex with an unsigned 32-bit seeded generator, and joins successive midpoints using quadratic Bézier commands to produce a continuously rounded outline. The result is serialized with a six-digit HEX fill, rounded to two decimal places, and packed into a single path inside an SVG element with an explicit width, height, matching viewBox, and accessible image label. Every one of those choices is stable: re-running the generator with the same inputs gives the same bytes. The path grammar itself is defined in the W3C SVG 2 paths specification, and the browser-oriented reference on the MDN SVG path element page confirms the same move, quadratic curve, and close-path commands that the generator emits.
Two behaviors are worth recording on their own. First, Randomize Shape changes only the seed; it does not touch your vertex count, irregularity, canvas size, or color. The browser's cryptographic random source supplies a new seed only when the button is pressed, and randomness is not called during React rendering, so unrelated rerenders cannot silently change the graphic. Second, invalid values are rejected by the pure generator instead of being clamped behind the user's back. That means if the recorded settings do not reproduce the blob, the mistake is in the record, not in the tool silently rewriting your inputs.
What the Generator Lets You Control
The controls are deliberately narrow. They define a focused shape generator, not a full vector editor, and the limits below are the full set of valid inputs. If your record is going to reproduce the blob, every one of these has to be captured.
| Input | Type | Accepted range | Notes for the record |
|---|---|---|---|
| Vertices | Integer | 3 through 12 | Higher values add detail to the silhouette but do not increase exported coordinate precision. |
| Irregularity | Integer percent | 0 through 100 | 0 gives every vertex the same radius; higher values allow radial variation while keeping points within the canvas margin. |
| Canvas size | Integer (px) | 128 through 1024 in the generator; the interface exposes three practical presets | The on-page preview is constrained by layout only — it does not replace the requested dimensions. |
| Fill color | Six-digit HEX | Strict six-digit format | The browser color input supplies valid values during normal use; the generator rejects anything else. |
| Seed | Unsigned 32-bit integer | Displayed below the result | This is the piece that pins the blob down. Without it, the record describes a class of shapes, not one. |
Document the Steps You Use to Generate an SVG Blob
The order matters. Open the generator first, settle on a design, capture the seed, then export — and only then write the record down. Mixing those steps is how records drift out of sync with the shape they describe.
- Open the generator and set the four stable inputs. Pick a vertex count between 3 and 12, set irregularity between 0 and 100, choose a canvas size from 128 to 1024 pixels (or pick one of the three preset sizes in the interface), and pick a fill color as a six-digit HEX. None of these change when you randomize, which is exactly what you want — they define the family of shapes the seed can choose from.
- Press Randomize Shape until the preview fits your design, then read the displayed seed. Each click asks the browser's cryptographic random source for a new unsigned 32-bit seed and re-renders the preview with that seed applied to your fixed inputs. Stop clicking once you see a shape you want to keep, and copy the seed number from the line directly below the result. This is the moment where documentation either locks in or silently fails.
- Copy the SVG markup or download the file. Copy SVG writes the complete markup to the clipboard; if browser permission is denied, the same markup is still visible in a read-only text area, so you can select and copy it manually. Download SVG saves a standalone .svg file as a data URL with a filename that embeds the seed, which is useful as a built-in sanity check when you later look at the file in a folder full of similar blobs.
- Test the file in the destination. Open the saved SVG in the editor, browser, email client, or content management system where it will actually live. Inline SVG and data URLs are sometimes stripped by sanitizers, so a file that looks correct on the generator's page may still fail at the destination. Treat this test as part of the record, not as an optional extra.
- Write the record. Capture the four stable inputs, the seed, the file name, the destination, the date or version, and the result of the destination test. Store the record next to the SVG, not in a different system where it can drift.
What to Write Down, Exactly
A record is only useful if a teammate — or future-you — can rebuild the blob from it without guesswork. The minimum useful record has six fields, and each one maps to a control the generator exposes. Vertices go in as an integer. Irregularity goes in as an integer percent. Canvas size goes in as an integer in pixels. Fill color goes in as a six-digit HEX without the leading hash if you want to keep it consistent with the generator's strict format, or with the hash if your team prefers CSS-style values — pick one and stick with it. The seed goes in verbatim, including any leading zeros the generator displays, because the seed is an unsigned 32-bit integer and even a single transposed digit gives a different blob. Finally, the file name goes in as saved, including the seed it embeds, so a future reader can confirm the file in the folder is the one the record describes.
Beyond those six fields, a few extras make the record robust. Note where the SVG will live (web page, email header, app background, slide deck). Note whether the file passed the destination test described in step four, and if it did not, note what the sanitizer changed so the next person does not waste an hour re-discovering the same blocker. Note any post-processing done in a vector editor — gradients, strokes, shadows, clipping, animation — because the generator deliberately does not add those, and the record should make clear which attributes came from the tool and which came from later editing. The how-to-check-the-result-after-you-generate-an-svg-blob guide covers the destination-test step in more depth and is a natural companion to the record.
Verifying the Record Reproduces the Blob
A documented workflow is only credible if it has been tested. Open the generator again, clear any current settings, and enter the recorded vertices, irregularity, size, color, and seed exactly as written. The preview should match the originally exported SVG to two decimal places of coordinate precision, which is the rounding the generator applies when it serializes the path. If it does not match, the most common causes are a typo in the HEX color (missing a digit, wrong case, accidentally including the hash in the wrong field), a vertex count written as a word instead of an integer, or a seed transcribed with a missing or extra digit. None of these can be diagnosed by the generator itself, since the generator rejects invalid values rather than clamping them — which is the right behavior for reproducibility but means the typo will surface as a different blob, not a friendly error.
When the preview matches, open the exported file in the destination again to confirm the sanitization result is the same as on the original test. If you find a discrepancy only in the destination, the record is still useful — what changed is the publishing environment, not the SVG itself — but note the new finding next to the original test so the next reader knows.
When Documentation Is More Than the Image
Documentation is also the handoff. If the blob will be used by someone who never opened the generator, the record is their only path to a consistent result. Hand them the record, the SVG file, and a one-line note about which field is the seed, since the seed is the field most likely to be skipped or accidentally edited. If the destination cannot accept the SVG, the record should include a fallback note — for example, the rasterized preview for a system that strips inline SVG, or the saved data URL for a system that accepts it. The record then becomes the contract for the shape, regardless of where it ends up.
The final check is also a habit. Treat every shipped blob as a record-driven artifact: regenerate from the record before publishing, not from the file alone. If regeneration produces a different shape, the record was wrong, and that is a problem you want to discover before the reader does.