filemarkr
All ToolsGuides
filemarkr

60+ free developer tools that run entirely in your browser — JSON formatter, JWT decoder, Base64, diff checker, regex tester, hash generator and more. No upload, no sign-up, completely private.

JSON & Data

  • JSON Formatter
  • JSON Minifier
  • JSON Validator
  • JSON to CSV
  • CSV to JSON
  • JSON to YAML

Encode & Decode

  • Base64 Encode / Decode
  • Base64 to Image
  • Image to Base64
  • URL Encode / Decode
  • HTML Entity Encoder
  • JWT Decoder

Text Tools

  • Text Diff Checker
  • Case Converter
  • Word & Character Counter
  • Slug Generator
  • Remove Duplicate Lines
  • Sort Text Lines

Generators

  • UUID Generator
  • Password Generator
  • Lorem Ipsum Generator
  • QR Code Generator
  • Random Number Generator
  • NanoID Generator

Popular Guides

  • How to Format and Pretty-Print JSON (Without Breaking It)
  • How to Minify JSON and Shrink Your API Payloads
  • How to Validate JSON and Pinpoint the Exact Syntax Error
  • How to Convert JSON to CSV for Excel and Google Sheets
  • How to Convert CSV to JSON (With Proper Header Detection)
  • All guides →

Explore

  • All Tools
  • JSON Formatter
  • JWT Decoder
  • Diff Checker
  • UUID Generator

Company

  • About
  • Privacy
  • Terms
  • Sitemap

Our Promise

  • 100% in your browser
  • Zero uploads
  • No sign-up, always free

© 2026 filemarkr. Designed & developed by Naved Naik.  All processing happens locally in your browser.

All tools

CSS Gradient Generator

Build linear and radial CSS gradients with a live preview.

100% private Instant, in-browser Read the guide
Loading the tool…

CSS Gradient Generator

The CSS gradient generator lets you build linear and radial gradients with a live preview and copy the code in seconds. Add as many color stops as you need, position them along the gradient, set the angle or direction, and watch the preview update in real time. When it looks right, copy a ready-to-use background declaration into your stylesheet — no manual gradient syntax required.

How it works

The generator runs entirely in your browser. Each change you make to a color stop, angle, or gradient type is applied to a live preview element and reflected immediately in the generated CSS, so the code you copy matches exactly what you see. Nothing is sent to a server, which means it responds instantly, works offline once loaded, and behaves the same on desktop and mobile.

How to use it

  • Choose a linear or radial gradient type.
  • Add color stops and position each color along the gradient.
  • Set the angle or direction for a linear gradient.
  • Copy the generated CSS into your stylesheet.

Building out a theme? Pair it with the Box Shadow Generator, sample colors with the Color Picker & Palette, or convert values using the Color Converter.

Private by design

Your gradient settings and generated code never leave your device. The tool is free, requires no sign-up, and runs completely client-side, so your work stays private.

Frequently asked questions

A linear gradient blends colors along a straight line at a set angle, while a radial gradient blends outward from a center point in a circular or elliptical shape.

Related tools

Box Shadow Generator

Design CSS box-shadows visually and copy the exact code.

Color Picker & Palette

Pick a color, get every format, and generate tints, shades and palettes.

Color Contrast Checker

Check text/background contrast against WCAG AA and AAA standards.

Meta Tag Generator

Generate SEO, Open Graph and Twitter meta tags from a simple form.