Free Online File Converter
Convert images, PDFs, data, and text instantly in your browser. 100% free, no sign-up, no data sent to servers.
JPG to PNG
Convert JPG/JPEG to PNG with transparency support.
PNG to JPG
Convert PNG to JPG with adjustable quality.
WebP to PNG
Convert WebP to widely-supported PNG.
PNG to WebP
Convert PNG to WebP for smaller files.
WebP to JPG
Convert WebP images to universal JPG.
JPG to WebP
Convert JPG to WebP for faster web loading.
SVG to PNG
Convert vector SVG to raster PNG.
HEIC to JPG
Convert iPhone HEIC photos to JPG.
BMP to PNG
Convert BMP bitmap to compressed PNG.
BMP to JPG
Convert BMP bitmap to compact JPG.
GIF to PNG
Extract the first frame of GIF as PNG.
AVIF to PNG
Convert AVIF images to PNG format.
AVIF to JPG
Convert AVIF images to universal JPG.
JFIF to JPG
Rename .jfif to .jpg without re-encoding.
JFIF to PNG
Convert .jfif (Windows / KakaoTalk) to PNG.
Image Resizer
Resize images to any dimension.
Image Compressor
Compress images while keeping quality.
Image Upscaler
Enlarge images 2x, 3x, 4x, or to a custom size.
YouTube Thumbnail Downloader
Download YouTube thumbnails in all sizes including HD.
PDF to Image
Convert PDF pages to PNG or JPG.
Image to PDF
Combine images into a single PDF.
PDF Merge
Merge multiple PDFs into one.
PDF Split
Split a PDF into separate pages.
Markdown to PDF
Convert Markdown to formatted PDF.
GIF to MP4
Convert GIF to MP4 for smaller size.
MP4 to GIF
Convert MP4 videos to GIF animations.
CSV to JSON
Convert CSV spreadsheet data to JSON.
JSON to CSV
Convert JSON arrays to CSV format.
XML to JSON
Convert XML documents to JSON.
JSON to XML
Convert JSON data to XML format.
YAML to JSON
Convert YAML config to JSON.
JSON to YAML
Convert JSON to YAML config format.
TSV to CSV
Convert tab-separated to comma-separated.
HTML to Markdown
Convert HTML markup to clean Markdown.
Base64 Encode/Decode
Encode text to Base64 or decode back.
URL Encode/Decode
Encode or decode URL-safe strings.
JSON Formatter
Format, validate, and beautify JSON.
Case Converter
Convert text between UPPER, lower, camelCase, snake_case.
Word Counter
Count words, characters, and reading time.
Lorem Ipsum Generator
Generate placeholder text for designs.
QR Code Generator
Generate QR codes for URLs, text, Wi-Fi.
📖 Latest Guides
Practical guides on file formats, conversions, and developer workflows.
- › Upscale Album Cover for Spotify Without Softening— Enlarge AI album art to Spotify 3000x3000 while preserving texture.
- › Base64 Encoding Explained— How Base64 works, when to use it, and size overhead.
- › CSV vs JSON vs XML— Choose the right data format for storage, APIs, and exchange.
- › YAML vs JSON for Config Files— Why YAML is preferred for configs and JSON for APIs.
- › Markdown to PDF Workflow— Best tools and settings for converting Markdown to print-ready PDF.
- › GIF to MP4— MP4 vs GIF for animations: file size, quality, browser support.
- › Reduce PDF File Size— Compress PDFs without losing readability. Image vs text-heavy PDFs.
- › PDF Merge vs ZIP— Combining files: single PDF or ZIP archive? Use case comparison.
📚 Browse All Guides
16 guides organized by topic.
Image Converters
Image Tools
Video
Data Converters
Text Utilities
41
Free Tools
100%
Browser-based
0
Files Uploaded to Server
Why OnlyFormat?
OnlyFormat is a collection of free online file conversion and developer tools that run entirely in your browser. Unlike traditional converters that upload your files to remote servers, every tool on OnlyFormat processes data locally using modern browser APIs like Canvas, WebAssembly, and the File API. Your files never leave your device, which means complete privacy and zero risk of data leaks.
There are no sign-ups, no daily limits, no watermarks, and no hidden fees. Whether you need to convert a single image or batch-process hundreds of files, OnlyFormat handles it instantly without any restrictions. The tools work on any device with a modern browser — Windows, Mac, Linux, and even mobile phones.
Supported Formats
Image Conversion: Convert between JPG, PNG, WebP, AVIF, BMP, GIF, SVG, and HEIC formats. Resize images to custom dimensions, compress files to reduce size, or extract frames from animated GIFs. Ideal for web developers, designers, and anyone who works with images daily.
PDF Tools: Convert PDF pages to images (PNG or JPG), combine multiple images into a single PDF, merge several PDFs into one document, or split a large PDF into individual pages. All processing happens client-side using pdf.js and jsPDF.
Video: Convert between GIF and MP4 formats using FFmpeg compiled to WebAssembly. Turn large GIF animations into compact MP4 videos, or create GIF animations from MP4 clips with adjustable frame rate and dimensions.
Data & Text: Transform data between CSV, JSON, XML, YAML, TSV, HTML, and Markdown. Encode and decode Base64 and URL strings. Format and validate JSON. Convert text case between uppercase, lowercase, title case, camelCase, and snake_case. Count words and estimate reading time.
How It Works
Using OnlyFormat is simple: select a tool, upload or paste your file, and download the result. The entire conversion process follows three steps. First, you choose the tool you need from the grid above or use the search to find it quickly. Second, you upload your file by dragging and dropping it onto the page or clicking to browse your device. Third, the tool converts your file instantly and you download the result with a single click.
Because everything runs in your browser, there is no waiting for server processing and no risk of your data being stored or shared. You can even use OnlyFormat offline once the page has loaded. This makes it especially useful for handling sensitive documents, proprietary images, or confidential data that you do not want to upload to third-party services.