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SyntaxSnap

Developer tools that never see your data.

Turn OpenAPI specs, SQL tables and JSON into Zod, Prisma and TypeScript, and design gradients and shadows you can see. Everything runs in your browser tab, so production data stays on your machine.

JSON tools OpenAPI to Zod Aurora gradient generator SQL to Prisma
account.json
import { z } from "zod";

export const Account = z.object({
  id: z.number().int(),
  email: z.string().email(),
  plan: z.string(),
  active: z.boolean(),
  tags: z.array(z.string()),
  limits: z.object({
    requests: z.number().int(),
    seats: z.number().int()
  })
});

export type Account = z.infer<typeof Account>;
Converted in your browser

Most used

Browse all 48 tools
JSON Formatter & Beautifier new Beautify or minify JSON with exact error line and column, a tree view, sort keys and one-click repair. Opens files up to 50 MB, all in your browser. Aurora Gradient Generator popular Create animated, pure CSS aurora backgrounds and mesh gradients. Generate Tailwind classes or raw CSS instantly. 100% local, privacy-first execution. OpenAPI to Zod popular Parse OpenAPI 3.x specifications and instantly generate TypeScript Zod validation schemas for all components. 100% client-side execution. SQL to Prisma Schema popular Convert SQL CREATE TABLE statements into Prisma schema models. 100% offline client-side parsing. Tailwind Shadow Gen popular Visually design multi-layered box shadows and neon glows, then instantly copy the Tailwind CSS v4 arbitrary class. 100% free and offline. TypeScript to JSON Schema Convert TypeScript interfaces and types into standard JSON Schema. 100% offline client-side parsing. JSON Viewer new Explore JSON as a collapsible tree with search, type badges and child counts. Click any node to copy its JSONPath. Nothing is uploaded. JSON to CSV Converter new Convert a JSON array to CSV or an Excel-ready file. Nested objects flatten into dot-path columns, with a live table preview.

Every tool, by what you are working on

JSON & Schema 18

Developer Utilities 20

Data Conversion 3

CSS & Design 5

AI Tools 2

Safe to paste production data

The work happens in your tab

47 of 48 tools are plain JavaScript running on your device. There is no server receiving your JSON, tokens or schemas.

You can check it yourself

Open your browser's network tab and use any tool. Converting and generating make no requests to a server.

The one exception is labelled

The AI Mock Generator sends your prompt to OpenAI to write the data. Its status bar says so, and it never sees anything else you paste.

Design tools you can see

Tune aurora and mesh gradients, glass panels and layered shadows with a live preview, then copy plain CSS or Tailwind classes.

Open Aurora Gradient All CSS tools

Free online developer tools without the upload

Most online formatters and converters send what you paste to a server. SyntaxSnap is a collection of 48 free developer utilities that run in your browser instead: a JSON formatter and validator, JSON to TypeScript and JSON to Zod converters, a JWT decoder, regex tester, Base64 and URL encoders, schema converters for OpenAPI, GraphQL, Prisma and SQL, and CSS generators for gradients, shadows and glassmorphism.