Is my data secure during conversion?

Yes. Selqio uses client-side technology. Files are processed locally in your browser.

Universal Converter

Convert Data & Files Instantly

The fastest way to transform data formats. From JSON to CSV for analysts, to Base64 for developers. Everything happens in your browser.

No File Uploads

Browser-based Engine

Bulk Processing

Conversion Tools

37 Tools Available

Advanced Text Encoder & Decoder

Multi-method text encoder supporting ROT13, ROT47, Caesar Cipher, Atbash, Base64, and reversal with real-time preview and advanced analysis. Professional toolkit for developers and security professionals with file upload, processing history, and export capabilities.

AI Language Detection & Translator

AI-powered language detection for 200+ languages with instant translation. Perfect for international content management and localization.

ASCII Art Converter

Convert images to ASCII art with adjustable complexity and character density. Perfect for retro art creation and text-based graphics.

Audio Trimmer & Converter (Basic)

Client-side audio trimming and format conversion using Web Audio API. Process audio files locally with waveform visualization and editing.

Color Converter (Hex, RGB, HSL)

Convert colors between Hex, RGB, HSL, and HSV formats with live preview and color picker integration. Essential for design and development workflows.

Coordinate Finder & Converter

Find exact map coordinates and convert between formats (Decimal, DMS, UTM). Essential for surveying, navigation, and GIS data collection.

CSV to JSON / JSON to CSV Converter

Convert data between CSV and JSON formats with client-side processing and custom formatting options for data migration and integration.

CSV/Excel to SQL Converter

Convert CSV and Excel files to optimized SQL insert statements. Automatic data type detection, NULL handling, and batch processing with error recovery.

Currency Converter

Convert between 150+ world currencies using real-time exchange rates. Live financial data with historical charts and favorite pairs for international transactions.

DAX Formula Generator & SQL Translator

Convert SQL queries to DAX formulas and build optimized expressions for Power BI and Analysis Services with performance tips.

EPUB to PDF Converter

Convert EPUB e-books to PDF format with customizable layout, fonts, and margins. Preserve formatting, images, and table of contents.

ERD Diagram Converter

Convert and visualize Entity-Relationship Diagrams in multiple formats. Import SQL, Mermaid, PlantUML, or JSON schemas.

HTML to JSX Converter

Convert raw HTML into React-ready JSX instantly. Automates class-to-className, style objects, and tag closing for faster development.

Image Converter

Convert images between PNG, JPG, and WebP formats with client-side processing ensuring complete privacy. Perfect for web optimization and compatibility.

Image to Base64 Converter

Convert images to Base64 encoded strings without uploading files. Perfect for email templates, reducing HTTP requests, and offline applications.

Image to PDF Converter

Convert multiple images to PDF instantly. Free online tool to combine JPG, PNG, GIF images into a single PDF document with customizable layout and quality settings.

Image to Vector Tracer

Convert raster images to scalable vector graphics instantly. Advanced SVG tracer with quality settings, color reduction, and multiple export options.

JSON <> YAML Converter

Convert data between JSON and YAML formats with syntax validation and error detection for configuration management and DevOps workflows.

Morse Code Translator

Convert text to Morse code and play audio signals. Free online translator with adjustable speed, frequency, and visual feedback for learning Morse code.

Multi-Format Geo Converter

Convert between GeoJSON, KML, GPX, WKT, CSV, and TopoJSON formats. Professional geographic data conversion for GIS and spatial data management.

PDF to Image Converter

Convert PDF pages to PNG or JPG images instantly. Free online PDF to image converter with high-quality output, batch processing, and multiple format support.

PDF to Text Extractor

Extract text from PDF files instantly. Free online PDF text extractor with OCR support, batch processing, and multiple export formats for easy text extraction and editing.

Photo Collage Maker

Create stunning photo collages with multiple templates and custom text. Free online tool with polaroid, family, wedding layouts and easy sharing options.

Screenshot to Text (OCR)

Extract text from images and screenshots using OCR with multi-language support and editable output formatting for document digitization.

SQL Schema Converter

Convert database schemas between MySQL, PostgreSQL, SQL Server, and Oracle. Automatic datatype mapping, constraint conversion, and index optimization.

SQL Schema to ERD Visualizer

Upload SQL schema and generate Entity-Relationship Diagrams using d3-graphviz for database visualization and documentation.

Table to JSON Converter

Convert HTML tables or CSV data into structured JSON format with customizable transformation and instant preview for API development.

Text Case Converter

Convert text between UPPERCASE, lowercase, camelCase, PascalCase, and more formats. Developer-focused tool for programming conventions and content creation.

Text-to-Speech & Speech-to-Text Converter

Convert text to natural speech and speech to text instantly. Free online tool with voice selection, audio controls, and real-time transcription for accessibility and productivity.

Text-to-Speech Previewer

Convert text to spoken voice using browser Web Speech API with voice, language, and speech rate customization for accessibility testing.

Timezone Converter

Compare times across multiple zones with automatic daylight saving adjustments. Perfect for international meetings and global team coordination.

Timezone Converter with DST

Convert between timezones with automatic DST handling. Compare multiple timezones, plan international meetings, and track daylight saving time transitions worldwide.

Unit Converter

Convert between measurement units including length, weight, temperature, volume, and more. Support for metric and imperial systems with precision.

Unit Converter (Extended)

Convert between 11+ unit categories including length, weight, volume, temperature, and more with scientific precision for engineering applications.

Video to GIF Converter

Convert videos to animated GIFs using client-side processing with quality settings and optimization controls for social media content.

Voice-to-Text Transcriber

Convert speech to text in real-time using advanced browser technology. Perfect for meetings, lectures, and accessibility.

YAML to Properties Converter

Convert YAML configuration files to Java .properties format with real-time conversion and validation for Spring Boot development.

One Suite for All Data Formats

Whether you are a data engineer or web developer, we handle the parsing logic for you.

Data Serialization

Seamlessly switch between JSON, XML, YAML, and CSV. Perfect for migrating data from legacy systems or preparing datasets for visualization tools like Tableau.

Encoding & Decoding

Work with binary data safely. Encode images to Base64 for inline CSS use, or URL-encode strings for API parameters. All without sending the data over the network.

File Transformation

Need a PDF page as a JPG? Or a WEBP image as PNG? Our WASM-powered engine handles binary file conversions locally, preserving quality while ensuring privacy.

Common Questions

Is my data secure?

Yes. Unlike other converters that require you to upload files to a server, Selqio processes everything locally in your browser. We never see your files.

Can I convert large CSV/JSON files?

Yes. Since we don't upload files, the only limit is your computer's memory. You can process multi-megabyte datasets faster than cloud tools.

Do you support batch conversion?

Many of our tools support pasting multiple records or selecting multiple files, depending on the specific converter.