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For companies

LAB to HEX

A free LAB to HEX converter: enter the three Lab numbers from a brand guide, a color measurement or a design file and get the hex code for the web. Type 54 -40 30 and you get #39924A. If the Lab color lies outside what a screen can show, you get the nearest hex color and a note that says so.

How to convert LAB to HEX

  1. 1Type L, a and b into "Color", for example 54 -40 30
  2. 2Or paste a full value such as lab(54% -40 30)
  3. 3Copy the hex code from the big line with "Copy"
  4. A hex code such as #39924A for your CSS or design tool

How it works

  • Plain numbers are enough.On this page three numbers are read as L, a and b, with spaces or commas between them
  • Honest about the gamut.A Lab color that HEX cannot hold is mapped to the nearest one, and the page tells you
  • Nothing is sent anywhere.Your browser does the arithmetic on your own device

What you can do

  • Turn L, a and b into a six digit hex code, written in capitals such as #39924A
  • Write Lab the CSS way too: L in percent, and a and b as percentages where 100% stands for 125
  • Compare your color and the hex result side by side in the swatch, and see RGB, HSL, CMYK, LCH and OKLCH below
  • Check whether the color has a CSS name or a Tailwind color close to it, with the ΔE (CIEDE2000) between them

Good to know

  • Lab can describe colors that sRGB, the range of HEX and rgb(), does not have. Then HEX shows the nearest color inside it, with less chroma but the same lightness and hue (the CSS Color 4 way)
  • L must lie between 0 and 100. a and b have no fixed limit, but very large values land outside sRGB
  • The tool reads Lab with the D50 white that CSS uses. Lab values measured for D65 come out slightly different
  • HEX has whole steps only, so going back from the hex code gives Lab values that differ a little from the ones you typed

Questions

How do I convert Lab to hex?

Type the three Lab numbers into the field, for example 62.5 30 -50. The hex code, here #A786F1, appears in the big line. Click "Copy" to take it.

Why does my Lab color show a note about sRGB?

Your Lab value lies outside sRGB, so no hex code matches it exactly. lab(50% 80 -110), for example, becomes #8E5DFF, the nearest color a screen in sRGB can show.

Can I type a, b with a minus sign?

Yes. Negative a is greener, negative b is bluer. Write the minus right before the number, as in 54 -40 30.

Does the tool send my values anywhere?

No. The conversion runs in your browser. No request is made with the color you type.

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How it works

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What runs where

Your browser keeps the tools you use: the same kind of tools you would otherwise use on a website. Your files stay on your device and are not uploaded.

A tool your browser has kept also works without internet. Under Offline, at the bottom of this page, you can save everything at once, and the site keeps working without a connection.

Some tools have AI built in, for example to remove a background or enlarge a photo. Your browser downloads their AI models once, from ToolRecipe itself, and then runs them on your device. No tool sends your files to an online AI service or to us.

On a computer, these tools use the graphics chip when it passes a short check, because that is usually faster. On a phone they run on the processor, with settings that fit in a phone’s memory.

Using a tool

Give the tool your file, choose what you want, save the result.

  • Start on the home page

    Drop a file in the box on the home page, or try a sample photo. Pick what you want to do and press “Open tool”. The tool opens with your file in it.

  • Put a file in

    Drop it anywhere on the page, pick it with “Choose a file” or paste it. No file yet? Search for the job, like “heic to jpg”.

  • Choose the settings

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  • Save the result

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  • Results

    The Results tab on the right edge keeps your latest results in this browser until you remove them. “Clear all” empties it.

Chaining tools

What one tool makes can go straight into the next, without saving it and opening it again.

  • “Use it in”

    Tap a result in Results and pick a tool under “Use it in”. The result is handed on to that tool.

  • Drag it

    You can also drag a result onto an open tool. On a phone, touch and hold it first.

  • From a chain to a recipe

    To run the same tools again later, make a recipe of them in the recipe builder.

The recipe builder

Drop a file in the box on the home page and add the steps one at a time. Nothing runs until you press “Run recipe” or “Open tool”.

  • Pick what to do

    The box shows a tile for each kind of job your file allows, such as “Make it smaller”. A tile opens its ready-made choices and every tool of that kind. “Back” returns to the tiles.

  • Add steps

    Each choice becomes a numbered step in the row at the top. “Add another step” shows suggested next steps, then the tiles for what the last step makes. The cross on a step removes it, and “Undo” brings it back.

  • Name it

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  • Run it

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  • Steps that need you

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  • Save or start over

    “Save the current steps as a recipe” keeps the steps under My recipes. You do not have to run them first. On the recipe screen, “Save this recipe” under the steps does the same. “Start over” clears the box for another file.

Recipes

A recipe is a few tools in a row: what one step makes goes into the next.

  • Ready-made recipes

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  • Make your own

    Build one in the box on the home page. On My recipes, “New recipe” opens the same builder at the top of the page, with a search box for the tool you need next.

  • My recipes

    Your saved recipes are under “My recipes” in the menu, in this browser. Open one to rename it or change its steps. Changes are saved at once. “Start with a file” runs it on a new file. “Delete” asks you to confirm, then deletes it.

  • Share a recipe

    “Copy share link” makes a link to the steps, never to your files. Nothing starts for the person who opens it until they choose a file of their own.

Ways of working

Tools and recipes run in your browser, on your device.

  • Start from a file

    Drop it in the box on the home page and pick what you want to do. Choose one step to open its tool, or add more to make a recipe.

  • Start from a tool

    Search for the job or open a tool from the menu. When the result is ready, tap it in Results and pick the next tool under “Use it in”.

  • Keep the steps

    A saved recipe keeps its name, its tools in order and the setting of each step. It never keeps your files or their names.

  • Come back later

    Open My recipes in the same browser, on the same device, and run a recipe on a new file. A recipe stays there until you delete it or clear your browser data.

Finding tools again

Every tool and every recipe has its own address.

  • Bookmark it

    On a tool’s page, press Ctrl+D (⌘D on a Mac) to keep it in your browser’s bookmarks.

  • On your home screen

    A tool can sit on your phone’s home screen like an app. See Install, below, for how.

  • Your own recipes

    Recipes you saved are under “My recipes” in the menu.

  • The stars

    The stars under a new result ask how well the tool worked. Your answer helps us improve it. Stars do not save the tool for you.

Who uses what

Tool sets for common jobs.

Put a tool on your home screen

The icon opens that tool, like an app.

iPhone and iPad

  1. Open the tool in Safari
  2. Tap Share (the square with the arrow)
  3. Choose “Add to Home Screen”, then Add

Android

  1. Open the tool in Chrome
  2. Tap the menu (⋮) at the top right
  3. Choose “Add to Home screen” or “Install app”

Computer

  1. Open the tool in Chrome or Edge
  2. Click the install icon in the address bar
  3. Choose Install

Regarding updates

We try to do regular updates and post new tools.

How you can check that files stay here

Tools read your files and make the result in this browser, on your device. Your files are not uploaded to be processed.

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