Developer
JSON Formatter
Beautify and validate JSON instantly in your browser.
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100% Client Side • Fast. Private. Simple.
Fast, private browser tools.
ToolMint is a privacy-friendly collection of online utilities for text, developer data, images, and everyday calculators. All tools run directly in your browser.
31tools
100%browser-side
Fastand private
Why use ToolMint?
- Instant results with no server delays
- Your data never leaves your device
- No accounts or logins required
- Clean, distraction-free interface
Pick a category
Category
Developer & Data
Format, convert, and inspect JSON, CSV, URLs, hashes, JWTs, and timestamps.
Explore CategoryText Utilities
Encode, decode, clean, and transform text quickly in your browser.
Explore CategoryImage Utilities
Resize, convert, and preview images without sending files to a server.
Explore CategoryCalculators
Simple everyday calculators for GST, EMI, percentages, and dates.
ExploreAll tools
Developer
JSON to CSV Converter
Convert arrays of JSON objects into CSV for spreadsheets.
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Developer
CSV to JSON Converter
Turn CSV rows into JSON objects quickly with header support.
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Text
Base64 Encoder
Encode plain text to Base64 locally in your browser.
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Text
Base64 Decoder
Decode Base64 back into readable text safely on your device.
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Developer
URL Encoder
Encode URLs and query text for safer sharing and API usage.
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Developer
URL Decoder
Decode percent-encoded strings into human-readable text.
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Text
Text Case Converter
Convert text to upper, lower, title, sentence, or slug case.
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Text
Slug Generator
Turn a title or phrase into a clean SEO-friendly slug.
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Developer
SHA-256 Hash Generator
Generate SHA-256 hashes in your browser using the Web Crypto API.
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Developer
JWT Decoder
Inspect JWT header and payload without sending tokens anywhere.
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Developer
Unix Timestamp Converter
Convert Unix timestamps to local date/time and back again.
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Image
Image to Base64
Convert an image file into a Base64 data URL directly in your browser.
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Image
Image Resizer & Converter
Resize images and export them as PNG, JPG, or WebP on your device.
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Calculators
GST Calculator
Calculate inclusive and exclusive GST amounts for common Indian tax rates.
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Calculators
EMI Calculator
Estimate monthly EMIs for loans using principal, interest, and tenure.
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Calculators
Percentage Calculator
Handle common percentage problems with one friendly calculator.
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Text
Word & Character Counter
Count words, characters, and paragraphs instantly.
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Developer
Password Generator
Generate strong, secure passwords locally in your browser.
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Developer
UUID v4 Generator
Generate random UUIDs (Universally Unique Identifiers).
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Developer
Color Converter
Convert colors between HEX, RGB, and HSL formats.
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Developer
HTML Encoder
Encode HTML special characters into safe entities.
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Developer
HTML Decoder
Decode HTML entities back into readable text.
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Text
Markdown to HTML
Convert Markdown text to clean HTML instantly.
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Developer
Regex Tester
Test and debug regular expressions with live matching.
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Developer
QR Code Generator
Generate QR codes from any text or URL in your browser.
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Calculators
Tip Calculator
Calculate tips and split bills quickly and easily.
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Calculators
Age Calculator
Calculate your exact age in years, months, and days.
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Calculators
Unit Converter
Convert between length, weight, temperature, and more.
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Text
Text Reverser
Reverse text, words, or characters instantly.
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Text
Find & Replace
Find and replace text with regex support.
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