Free Online Converters

Encrypt and decrypt text with AES-GCM using a password. Runs entirely in your browser.

Split text into token-sized chunks with configurable overlap for RAG and embedding pipelines.

Parse AI API cURL commands and extract structured request details.

Convert CSV, TSV, or JSON data to JSONL format for LLM fine-tuning with role mapping.

Split long prompts into chunks that fit within model context windows.

Generate all standard iOS and Android app icon sizes from a single source image.

Convert AVIF images to JPEG with a quality slider — runs entirely in your browser.

Convert AVIF images to lossless PNG format in your browser.

Convert binary numbers to decimal, hexadecimal, and octal.

Convert BMP images to PNG format instantly in your browser with no quality loss.

Compress multiple images at once with a quality slider. See savings per file and download individually or all at once.

Convert multiple images to JPEG, PNG, or WebP at once with a shared quality setting and individual download buttons.

Resize multiple images to a target width while preserving aspect ratio. Preview and download each result.

Convert text between UPPER, lower, Title, camelCase, snake_case, and more.

Convert colors between HEX, RGB, and HSL formats with a live preview swatch.

Find the nearest CSS named color to any hex color.

Map common CSS properties to approximate Tailwind CSS utility classes.

Convert CSV data to a JSON array of objects.

Convert CSV data into SQL INSERT statements with auto-detected column types.

Convert CSV (comma-separated) to TSV (tab-separated) format.

Convert a cURL command to Python, JavaScript, Go, and PHP code.

Convert decimal numbers to binary, hexadecimal, and octal.

Convert decimal numbers to hexadecimal, binary, and octal.

Upload a .der file and convert it to PEM format with the appropriate header and footer.

Convert between all Ethereum denominations: wei, kwei, mwei, gwei, szabo, finney, ether.

Find text and replace it with options for case sensitivity and regex.

Extract the first frame of a GIF and export it as a PNG image via canvas.

Convert HEIC/HEIF images to JPEG in your browser. Works natively in Safari; limited support in other browsers.

Convert hexadecimal numbers to decimal, binary, and octal.

Convert HEX color codes to RGB and HSL values with a live preview.

Move CSS from <style> blocks to inline style attributes for HTML emails.

Convert HTML markup to valid JSX for React components.

Convert HTML markup to clean Markdown syntax.

Extract plain text content from HTML markup.

Convert ICO icon files to PNG images instantly in your browser.

Upload an image and draw rectangles, arrows, and text labels on it, then download the annotated result.

Apply Gaussian blur to any image with a radius slider using the CSS filter canvas API.

Add a custom border and optional rounded corners to any image.

Adjust brightness, contrast, and saturation of any image using canvas CSS filters.

Compress images by adjusting JPEG quality to reduce file size without leaving your browser.

Crop images by specifying pixel coordinates and dimensions, with common aspect ratio presets.

Remove all EXIF metadata from JPEG images by re-rendering on canvas, protecting your privacy.

Flip an image horizontally or vertically with a single click. Preview the result and download as PNG.

Convert any image to grayscale using pixel-level luminance calculation in the browser.

Invert all colours in an image (255 − r, 255 − g, 255 − b). Side-by-side before/after preview. Download result.

Overlay a second image on top of a base image with adjustable position and opacity.

Resize an image by entering a percentage (10–200%). New dimensions are shown in real time. Download the resized result.

Resize images to exact dimensions with optional aspect ratio lock, entirely in your browser.

Rotate images 90°/180° or flip them horizontally and vertically using canvas transforms.

Round the corners of any image with a custom radius and download as PNG.

Apply a sepia tone filter to any image for a warm, vintage look. Preview before/after and download the result.

Add positioned text annotations to an image. Control font size, colour, and alignment. Download result as PNG.

Convert any image into 16×16, 32×32, and 48×48 favicon PNG files with live previews.

Combine one or more images into a single PDF document — one image per page. No server upload required.

Convert any image to WebP format with a quality slider and file size comparison.

Add a text watermark to any image with custom position, opacity, and font size.

Resize and crop images to Instagram post, portrait, landscape, and story dimensions.

Convert IPv4 addresses between dotted decimal, binary, hexadecimal, and integer formats.

Convert JPEG images to lossless PNG format entirely in your browser.

Convert JPEG images to WebP format with a quality slider — runs entirely in your browser.

Convert JSON to C# classes with auto-implemented properties.

Convert a JSON array of objects to CSV format.

Convert JSON to Go struct definitions with json tags.

Convert JSON to Java classes with private fields and getters/setters.

Convert JSON to Python dataclasses with type hints.

Infer a SQL CREATE TABLE statement from a JSON object or array.

Convert JSON to TypeScript interfaces with proper type inference.

Convert a JSON object to indented XML markup.

Convert JSON to YAML format with proper indentation.

Convert Markdown to Discord-flavored markdown with Discord-specific formatting.

Convert Markdown text to clean HTML markup.

Convert standard Markdown to Slack mrkdwn format.

Convert numbers to English words. Supports integers, decimals, and negatives.

Convert a JSON object to a URL query string.

Add page numbers to every page of a PDF document.

Re-serialize and optimize PDF structure to reduce file size.

Combine multiple PDF files into a single document.

Extract individual pages from a PDF as separate PDF files.

Reorder pages in a PDF using up/down controls, then download.

Rotate all pages or individual pages in a PDF by 90, 180, or 270 degrees.

Extract a range of pages from a PDF into a new file.

Convert a PEM certificate or key to binary DER format and download the .der file.

Convert PNG images to AVIF format with a quality slider. Requires a browser with AVIF encoding support.

Convert PNG images to uncompressed BMP format using a built-in BMP encoder — runs entirely in your browser.

Resize a PNG to 32×32 and export it as a favicon-compatible PNG for use as a browser icon.

Convert PNG images to JPEG with a quality slider and see the before/after file size.

Parse a URL query string into a JSON object.

Reverse text by characters, words, or lines.

Convert RGB color values to HSL with HEX equivalent and live color preview.

Convert between Roman numerals and decimal numbers in both directions.

Convert between standard numbers and scientific notation.

Combine screenshots into a single PDF document — one screenshot per page. Runs entirely in your browser.

Convert text to a URL-friendly slug instantly.

Convert tab- or pipe-separated SQL CLI output into clean CSV format.

Convert SQL SELECT queries to MongoDB find() syntax.

Render an SVG file onto a canvas and export it as a JPEG image with adjustable quality.

Render SVG files to PNG at a specified width and height using the Canvas API.

Find the closest Tailwind CSS color class for any hex color.

Convert TIFF images to PNG format in your browser. Works in Safari and browsers with native TIFF support.

Show a date and time across multiple timezones simultaneously.

Convert TSV (tab-separated) to CSV (comma-separated) format.

Strip tracking parameters from URLs to get clean, shareable links.

Convert WebP images to JPEG with a configurable quality slider and size comparison.

Convert WebP images to lossless PNG format in your browser with no server required.

Convert XML to a JSON object using recursive element traversal.

Convert YAML to JSON with proper structure and types.