Developer Tools

Format, convert, and validate JSON, CSV, and other data formats on the spot. This category has 51 Uddatak tools that run directly in your browser — no software to install.

JSON Formatter

Format, validate, and beautify JSON data instantly.

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CSV to JSON Converter

Convert between CSV and JSON data in either direction, right in your browser.

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Excel to CSV Converter

Convert an Excel worksheet into a plain CSV file.

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CSV to Excel Converter

Convert CSV data into a downloadable Excel (.xlsx) file.

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Excel to JSON Converter

Convert an Excel worksheet's rows into a JSON array of objects.

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JSON to Excel Converter

Convert a flat JSON array of objects into a downloadable Excel file.

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CSV Cleaner

Remove empty rows/columns, trim whitespace, and dedupe rows in a CSV file.

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Password Generator

Generate a strong, random password with the settings you choose.

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Image to Base64 Converter

Convert an image into a Base64-encoded Data URL.

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Base64 to Image Converter

Turn a Base64 string or Data URL back into a downloadable image.

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Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 back to text, with full Unicode support.

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URL Encoder/Decoder

Percent-encode a URL or text, or decode an already-encoded string back.

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UUID Generator

Generate one or more random UUIDs (v4) instantly.

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Hash Generator

Generate MD5, SHA-256, CRC32, and other hashes from text, or all of them at once.

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Unix Timestamp Converter

Convert between a Unix timestamp and a human-readable date, in both directions.

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JWT Decoder

Decode a JWT's header and payload to see what's inside, without verifying the signature.

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JSON to YAML Converter

Convert between JSON and YAML in either direction.

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HTML Entity Encoder/Decoder

Escape special characters into HTML entities, or decode entities back to plain text.

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Color Converter

Convert a color between HEX, RGB, and HSL formats instantly.

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Random Number Generator

Generate one or many random integers within a custom range, using a cryptographically secure generator.

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Regex Tester

Test and debug a regular expression against sample text, with live matches highlighted.

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Cron Expression Builder & Tester

Build a cron expression from presets or write your own, and preview its next run times.

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SQL Formatter

Reformat a SQL query onto readable, indented lines, or minify it into one line.

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XML Formatter

Reformat XML with proper indentation, or minify it into a single line.

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JSON Diff Checker

Compare two JSON documents and see exactly what was added, removed, or changed.

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JSONPath Tester

Test a JSONPath expression against JSON data and see the matched results instantly.

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URL Parser

Break a URL down into its protocol, host, path, query parameters, and more.

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Query String Builder

Build or parse a URL query string from key/value pairs.

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Markdown Preview

Write Markdown and see a live, safely-rendered HTML preview side by side.

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HTML Formatter

Reformat HTML code with proper indentation, or minify it into a single line.

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CSS Formatter

Reformat CSS onto readable, indented lines, or minify it into a single line.

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Password Strength Checker

Check how strong a password is, with a real entropy estimate and specific improvement tips.

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Code Minifier

Minify CSS or JSON to reduce its file size for production.

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JWT Encoder (HS256)

Sign a JSON payload into a JWT using HMAC SHA-256, for testing and development.

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Text Encryptor

Encrypt or decrypt text with a password, using AES-256-GCM.

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File Checksum Calculator

Compute a file's SHA-1, SHA-256, SHA-384, and SHA-512 checksums, right in your browser.

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IP Subnet Calculator

Calculate the network address, broadcast address, and usable host range for an IPv4 CIDR.

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Number Base Converter

Convert a number between binary, octal, decimal, and hexadecimal, all at once.

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XML to JSON Converter

Convert between XML and JSON in both directions, with attribute support.

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Markdown to HTML Converter

Convert between Markdown and HTML in both directions.

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JSON Auto-Repair

Automatically fix trailing commas, unquoted keys, and single quotes in JSON.

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JSON Schema Validator

Validate JSON data against a JSON Schema, with every violation and its exact location shown clearly.

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Real File Type Detector

Detect a file's true type from its binary signature, regardless of its filename extension

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X.509 Certificate (SSL/TLS) Parser

View any PEM-format X.509 certificate's details — issuer, validity, and keys

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HTML Accessibility Checker

Scan HTML code for common accessibility issues — missing alt text, unlabeled fields, wrong heading order, and more.

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Mock/Fake Test Data Generator

Define your data fields (name, email, date, number...) and get realistic-looking test data ready as CSV or JSON.

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SVG Optimizer

Reduce SVG file size by removing comments, editor bloat, and excess numeric precision.

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cURL to Code Converter

Convert any curl command into ready-to-paste JavaScript, Python, PHP, or Go code.

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JSON to Type Definitions Converter

Convert any JSON into a ready-to-paste TypeScript interface, Python dataclass, or Go struct.

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CSV Pivot Table

Group CSV data by a column and calculate the sum, average, or count for each group.

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.gitignore Generator

Generate a ready-to-use .gitignore file by picking your language, framework, editor, and OS.

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