UFreeTools - Your Best Free Tools

Online JSON formatting and validation tool, supporting compression and beautification

Obfuscate JavaScript and CSS code to enhance security and protect intellectual property

Generate random UUIDs and GUIDs with customizable options, useful for database keys, temporary filenames, etc.

Generate customizable QR codes for URLs, text, and more

Precisely crop, resize, and rotate images

Quickly convert data between text and Base64 encoding

Perform bitwise AND operations on hexadecimal numbers and see the results in different formats.

Generate secure, random passwords with customizable options

Generate random names of various types, including different cultural backgrounds and styles

Free online audio loop tool, supports WAV, MP3, FLAC, OGG and other audio formats for loop creation. Customize loop count, interval time, and fade out effect. Perfect for background music, ringtones, meditation audio and more.

Free online audio speed changer tool. Adjust audio playback speed and pitch independently. Support time stretching without pitch change, pitch shifting without tempo change. Perfect for audio editing, music learning, and speech processing.

Free online audio reverse tool. Reverse audio playback with ease.

Free online audio joiner tool that supports merging multiple audio files into one. Supports WAV, MP3, FLAC, OGG and more formats, with customizable order, batch processing, ideal for podcast production and music editing.

Free online audio volume adjustment tool. Supports WAV, MP3, FLAC, OGG and more. Features volume increase, decrease, mute, and normalization. Perfect for audio processing, video dubbing, and podcast production.

Free online audio visual editor with waveform display, audio trimming, fade in/out, volume control, selection export and more. Perfect for podcast production, audio editing and music production.

Online JSON formatting and validation tool, supporting compression and beautification

Test and debug regular expressions with real-time highlighting and explanation

Simulate Git merge conflict scenarios and practice resolving code conflicts

Convert between HTML text and entity encoding

Parse, verify and debug JWT tokens online

Automatically generate TypeScript interfaces and client code based on OpenAPI specifications

Generate customizable QR codes for URLs, text, and more

Pick, convert and generate color schemes with advanced color tools

Create harmonious color schemes for your design projects

Create and customize beautiful CSS gradients with real-time preview and copy the code to your project

Create flowcharts and diagrams using a simple text-based syntax

Browse and use various diagram examples to meet different modeling needs

Quickly convert data between text and Base64 encoding

Convert CSV data to JSON format with customizable options

Convert numbers between different numeral systems and formats

Convert between timestamps and human-readable dates with support for multiple formats and timezones

URL encoding converts special characters into a format that is acceptable for URLs, commonly used for URL parameters and form submissions.

Convert between XML and JSON formats with advanced options and custom settings

Edit and preview Markdown documents with real-time rendering

Convert Markdown text to HTML with customizable options

Detect and filter sensitive words in text, supporting custom word libraries and filtering rules

Randomly shuffle words, sentences, or lines in your text while maintaining formatting

A comprehensive tool for decoding, visualizing, and analyzing ASN.1 encoded data structures used in cryptography, telecommunications, and network protocols. Supports PEM, HEX, Base64, and DER formats with interactive tree visualization and multiple export options.

Free online Excel duplicate removal tool, supporting xlsx/xls/csv file deduplication. Smartly identifies duplicate data, provides multiple deduplication rules, supports batch processing, and one-click export in Excel/CSV format

Compress and optimize images while maintaining quality

Adjust, convert, and optimize multiple images at once

Extract color palettes and dominant colors from images

Add text or image watermarks to your photos with customizable settings

Precisely crop, resize, and rotate images

Extract individual frames from GIF animations

Analyze and evaluate the security of HTTP response headers

Create, edit, and test HTTP request headers

Quickly create Cross-Origin Resource Sharing (CORS) configurations supporting multiple server environments

Convert cURL commands into code snippets in various programming languages

Test and debug gRPC services and protobuf messages

Detect and analyze HTTP proxies and intermediary devices in your connection

Generate secure, random passwords with customizable options

Check and analyze password strength with detailed security metrics

Supporting over 30 hash algorithms including SHA-256, MD5, SHA3, BLAKE3, SM3, CRC32, RIPEMD, KECCAK, SHAKE, and more — this free online tool helps you generate hash values for any text or file.

Securely encrypt and decrypt text and files using various symmetric encryption algorithms, including AES, DES, and SM4

Compute HMAC (Hash-based Message Authentication Code) for data using a key

Free online X.509 certificate decoder tool. Parse and analyze SSL/TLS certificates, view certificate details, check validity, extract public keys, and export reports.

Generate and export LaTeX mathematical formulas in real-time

Create custom countdowns for important dates or events

Boost productivity and focus with the Pomodoro Technique

Calculate monthly payments, total interest and payment schedule for housing, car and personal loans

Calculate personal income tax and take-home salary from your earnings

Calculate your Body Mass Index (BMI) and assess your weight status

Convert geographic coordinates between different coordinate systems including WGS-84, GCJ-02, BD-09, Web Mercator, and UTM

Visualize and replay GPS tracks from various file formats (GPX, KML, GeoJSON, CSV).

Convert between geographic coordinates (latitude/longitude) and Gaussian projection coordinates

Free online LIDAR point cloud viewer supporting LAS, XYZ, PLY, PCD formats. Provides 3D visualization, multiple coloring modes, interactive navigation, and data analysis features

Free online coordinate picker and latitude longitude query tool. Support clicking map to get coordinates, EPSG projection coordinate display, place name search and positioning, batch annotation and export CSV/GeoJSON, compatible with PC and mobile.

Free online geodetic calculator for calculating great circle distance, azimuth angle, and polygon area. Supports WGS84, CGCS2000 and other ellipsoid parameters, providing high-precision algorithms and visualization results.