The fix for blurry schema diagram exports is not a higher DPI setting - it is exporting a vector format, and exporting less diagram. Schemity does both: SVG export that stays sharp at any zoom, and context views that let you export the ten tables your reader cares about instead of the two hundred they do not. And where the destination renders Mermaid - GitHub, GitLab, Notion - it exports the diagram as a Mermaid erDiagram file and skips the image entirely.

But start with the moment the problem shows up, because it never shows up on your screen. It shows up on someone else’s. You finish arranging the diagram, export a PNG, paste it into the design doc, and move on. A day later a teammate opens the doc, zooms in to read a column name, and finds mush - anti-aliased gray smudges where the field types used to be. The diagram was correct. The export threw its readability away.

This failure is old, common, and still open. A DBeaver user asked for better output in 2023 in exactly these words: the image generated by exporting a diagram “is in low resolution”, asking for an option to set image quality or DPI - a request that has sat open since February 2023. Other users report the mirror-image failure: exports of any diagram bigger than one screen coming out cropped at the screen’s edge. And cranking up the resolution is not an escape hatch, because pixels scale quadratically - as Genuitec’s own ERD documentation warns, “a large ERD can easily require 100s of megabytes to represent it in image format”, sometimes failing the export outright because the bitmap is too large to build at all.

Notice the shape of the trap. A raster export forces you to pick a resolution up front, before you know how the image will be read - and every choice loses. Low resolution is unreadable when zoomed, high resolution is a hundred-megabyte file nobody can paste anywhere, and the diagram itself keeps growing, so whatever resolution worked last quarter fails this one. For a schema visualizer, whose entire output is fine text inside small boxes, that is a structural defect, not a settings problem.

How do I export a database diagram without losing quality?

Export SVG instead of pixels. Schemity exports any diagram as PNG, JPEG, or SVG, and the SVG output is vector: shapes and text are stored as geometry, not as a grid of pixels, so the diagram renders sharp at every zoom level - 50% in a wiki page or 800% while someone squints at one foreign key. The text stays selectable, so a reader can copy a table name straight out of the image. And because vector size grows with the number of shapes rather than the number of pixels, a large diagram exports to a file measured in kilobytes, not the hundreds of megabytes a bitmap of the same schema would need.

Fidelity carries over too. The details that make a Schemity diagram readable on the canvas - relationship lines that hop over each other where they cross, waypoint turns with smooth rounded corners - render identically in the SVG export. The diagram you share is the diagram you drew, not a flattened approximation of it.

Export a context view instead of the whole diagram

The other half of the fix is scope. Most blurry-poster exports exist because the tool offered only one thing to export: everything. But the reader of a design doc almost never needs the full schema - they need the billing tables, or the auth tables, and nobody can read the 800-table poster anyway.

A context view is a focused subset of the main diagram - a sub-diagram you arrange freely while the schema itself stays untouched in the main view, which remains the single source of truth. Schemity exports any context view the same way it exports the main diagram: as PNG, JPEG, or SVG, with the arrangement you gave it. So the payments doc gets a crisp image of the eight payment tables, laid out for that story, and the onboarding doc gets a different eight - each one small enough to read without zooming in the first place. Exporting less diagram does more for readability than any resolution slider ever could.

Export Mermaid when the doc renders diagrams itself

Sometimes the best exported image is no image at all. GitHub, GitLab, Notion, and Obsidian all render Mermaid diagrams natively from a fenced code block in markdown - and Schemity exports your diagram as a Mermaid erDiagram file. Paste it into a README or a pull request description and the platform draws the schema itself, as vector, sharp at every zoom, with nothing to upload and no attachment to go stale in a media folder. Because the diagram is now text in the document, it also behaves like text: reviewers see schema changes as a readable diff, not as “image replaced”.

One honest note: Mermaid describes entities and relationships, not your canvas. The renderer arranges the boxes itself, so the layout you crafted - the legends, the routing, the grouping that tells the story - does not travel with it, though your entity colors do, as the render above shows. Mermaid is the right export for docs that live where Mermaid is native; when the arrangement is the point, SVG remains the format that carries it faithfully.

When the reader needs SQL, skip pixels entirely

Some of what gets shared as a screenshot never wanted to be an image. If a teammate asks “what exactly is in the invoicing tables?”, the faithful answer is DDL, not pixels. Schemity exports SQL at the same granularities as images: the whole diagram, any context view, a single entity - or one right-click on a legend to export the CREATE statements of every entity inside it. The legend that groups your invoicing tables on the canvas becomes the exact SQL of that group in the clipboard, ready to paste into a code review or hand to an AI assistant.

All of this runs in a lightweight desktop app, fully offline. Schemity is an offline ERD tool for software engineers: the diagram lives in a plain local JSON file, exports are rendered on your machine with no upload step, and the SVG never passes through a server that might re-rasterize or watermark it on the way out. The layout work you are exporting is exactly the work that is too valuable to trust to a tool that treats the diagram as disposable - it deserves an export path that preserves it, at every zoom level, for every reader.

An exported diagram has one job: to be read somewhere you are not. A format that caps its readability at a resolution you had to guess in advance fails that job by design. Export vectors, export focused views, export Mermaid where the doc can draw the diagram itself, export SQL when SQL is the real question - and the person who zooms in finally sees what you drew.