Sketch never really went away. A significant number of product teams, particularly those that built their design systems before 2020, are still working in Sketch daily. The files work. The symbols are mature. The team knows the tool. There is no urgent reason to migrate until suddenly there is: a new engineer who has only ever used Figma, a need for real-time collaboration, or a decision to adopt a design token toolchain that expects Figma variables as input.
When that moment comes, teams discover that the Sketch file is simultaneously their most valuable design asset and their biggest migration obstacle. Here is how to think about the problem clearly and move through it without rewriting everything from scratch.
Understand What You Are Actually Migrating
Before opening any export tool, you need to separate three things that Sketch conflates: the visual specifications, the symbol structure, and the token values.
Visual specifications are the intended appearance of each component: sizes, colors, spacing, typography. These live in the Sketch file, but they are also what should end up in your token file. If your Sketch file uses shared styles consistently, the color and typography values can be extracted programmatically.
Symbol structure is how components nest and override each other. A Sketch symbol for a card has nested symbols for the image placeholder, the heading, and the body text. This structure is what you want to preserve as component hierarchy in React.
Token values are (or should be) the abstract design decisions underneath the visual specs. If your Sketch file uses shared text styles named "body" and "heading" with specific font sizes, those are your type tokens. If it uses shared layer styles named with color roles, those are your color tokens. The migration is an opportunity to make implicit tokens explicit.
Most migration failures happen because teams try to do all three simultaneously. The symbol library transforms get confused with the token extraction, which gets confused with the React component authoring. Separating these three workstreams and completing them in order makes the process tractable.
Step One: Extract Tokens Before Touching Components
The first action in any Sketch-to-React migration is to extract the token layer from the Sketch file and express it as a format that code can consume. Tokens Studio works well here because it can import from Sketch shared styles and output W3C DTCG-compatible JSON.
The goal is a token file where every named value from the Sketch file has an explicit entry. --color-primary: #3DFFA3, --font-size-body: 1rem, --space-md: 1rem. Once you have this file, your React components can reference token values rather than hardcoded values. This is what makes the migration durable: any future design tool change only requires updating the token file, not reopening every component.
Sketch shared styles are usually clean enough for this extraction if the design system was built with reasonable discipline. Where teams hit problems is with ad-hoc overrides, one-off font sizes, and local colors that were never added to shared styles. Audit your shared styles count versus your layer count. A ratio of more than one local style per three layers suggests cleanup work before extraction.
Step Two: Map Symbols to Component Structure
Sketch symbols are hierarchical: a symbol can contain other symbols. This maps cleanly to React component composition. A Card symbol that contains CardImage, CardHeading, and CardBody symbols should become a Card React component that renders CardImage, CardHeading, and CardBody child components.
The translation is not automatic, but it is systematic. For each top-level symbol in your library, identify its direct child symbols. Those become the component's direct children in React. Symbol overrides in Sketch (the properties panel that lets you swap text or nested symbols) map to React props.
Where Sketch symbol structure does not map cleanly to React is in the overrides model. Sketch allows overriding any nested symbol with any other symbol of compatible size. React props have types. A prop that accepts a string should not accept a React node. As you translate symbol overrides to props, you are making these type decisions explicit, and that is the right time to make them, not after the component is in production.
Handling the Sketch-Specific Patterns
Sketch has several conventions that need careful translation:
Nested overrides. A form symbol in Sketch might have a label override, an input override, and an error message override, each controlled separately. In React, this becomes a set of named props on the Form component. Keep the names consistent with the Sketch override names during migration so the mapping is traceable.
Symbol states via overrides. Sketch teams often simulate states by using overrides to swap between different symbol variants (a button with a default border versus a button with an error border). In React, these become a single component with a state or status prop. The migration converts multiple Sketch symbols into one React component with a controlled prop.
Resizing constraints. Sketch has four-directional resizing constraints that control how layers behave when the parent resizes. These do not have a direct CSS equivalent. You need to interpret the constraint intent: "fixed left, stretch width" becomes width: 100% with a left anchor. This interpretation requires judgment, not a mechanical translation.
What to Not Migrate
Not every Sketch symbol needs a React component. Sketch files accumulate experimental artboards, exploratory layouts, and one-off screens that were never part of the design system. Migrating these to React would produce a component library full of unused noise.
Before the migration, run an audit of symbol usage across your Sketch pages. Any symbol used fewer than three times across your active artboards is a candidate for deletion, not migration. The migration is a forcing function to clean up the design system, not just port it to a new format.
A Realistic Timeline
For a design system with 40 to 80 symbols, a structured migration takes roughly six to ten weeks with two people: one designer handling the Sketch audit and token extraction, one engineer handling the React component authoring. The phases are sequential: token extraction and validation, symbol audit and pruning, component authoring against the token file, and then parallel design file migration to Figma if that is part of the goal.
The common mistake is treating this as a one-sprint task and then discovering mid-sprint that the token extraction alone needs two weeks of cleanup. Plan for the token phase to take as long as the component phase. The design foundation is where the complexity lives.
The Opportunity Inside the Migration
The reason to go through this work is not just to have Figma instead of Sketch. The opportunity is to end the migration with a token file that is the single source of truth for both design and code, a component library where every prop matches a documented variant, and a pipeline where design system updates flow from the token file to the component output without manual translation.
That outcome is worth the effort. The migration is the hard part. The design system that comes out the other end is easier to maintain than what you started with.