Data
JSON Formatter
Format, minify, and validate JSON in your browser. Nothing is sent to a server.
Developer tools
Every tool runs in your browser. Open a category or jump straight to a workspace.
Categories
Data
Inspect and clean structured data.
3 tools
Encoding
Encode and decode common text formats.
2 tools
Generators
Create identifiers and schedule expressions.
2 tools
Time
Convert timestamps and dates.
1 tool
Text & Query
Test patterns and format queries.
2 tools
Business
Create professional assets for email and outreach.
4 tools
PDF
Merge, split, convert, organize, watermark, and sign PDF files in your browser.
8 tools
Images
Compress and resize images locally in your browser.
2 tools
Data
Data
JSON Validator
Validate JSON and see clear error locations. Runs entirely in your browser.
Data
JWT Decoder
Decode a JWT header and payload in your browser. Decoding does not verify the signature.
Encoding
Encoding
Base64 Encoder / Decoder
Encode and decode Base64, including Unicode text, locally in your browser.
Encoding
URL Encoder / Decoder
Encode and decode URL components, including Unicode, in your browser.
Generators
Generators
UUID Generator
Generate UUID v4 identifiers locally with the Web Crypto API.
Generators
Cron Expression Generator
Build a cron expression from minute, hour, day, month, and weekday, with a plain-language explanation.
Time
Time
Unix Timestamp Converter
Convert between Unix timestamps and dates. Seconds or milliseconds, local time or UTC.
Text & Query
Text & Query
Regex Tester
Test regular expressions against sample text in your browser. Invalid patterns cannot crash the page.
Text & Query
SQL Formatter
Format SQL in your browser. Supported dialects are listed on the page; this is not a universal SQL parser.
Business
Business
Email Signature Generator
Create a professional HTML email signature in your browser. Copy it into Gmail, Outlook, or Apple Mail. Nothing is uploaded.
Business
QR Code Generator
Create a static QR code in your browser for a URL, text, email, phone, SMS, Wi-Fi, or vCard. Download PNG or SVG. Nothing is uploaded.
Business
Invoice Generator
Create a professional invoice in your browser. Add line items, tax, discounts, and a logo, then print or download a PDF. Nothing is uploaded.
Business
Digital Business Card
Build a digital business card in your browser. Download a vCard, export a PNG, and include a static contact QR. Nothing is hosted or uploaded.
PDF
Merge PDF
Combine multiple PDF files into one document in your browser. Reorder files, then download. Nothing is uploaded.
PDF
Split PDF
Extract selected PDF pages or download pages as separate files. Choose pages or ranges in your browser. Nothing is uploaded.
PDF
JPG to PDF
Convert JPG and PNG images into a PDF in your browser. Reorder images, choose page size, and download. Nothing is uploaded.
PDF
PDF to JPG
Convert PDF pages into JPG images in your browser. Download one image or a ZIP of selected pages. Nothing is uploaded.
PDF
Rotate PDF
Rotate individual PDF pages or the whole document in your browser. Preview changes, then download. Nothing is uploaded.
PDF
PDF Page Organizer
Reorder, delete, duplicate, and rotate PDF pages online for free. Organize your PDF locally in your browser without uploading files.
PDF
Add Watermark to PDF
Add text or image watermarks to PDF files for free. Customize opacity, size, rotation, and position directly in your browser.
PDF
Sign PDF
Draw, type, or upload a signature and place it on a PDF online for free. Sign documents locally without uploading your files.
Images
Images
Image Compressor
Compress JPG, PNG, and WebP images online for free. Reduce image sizes locally in your browser without uploading files.
Images
Image Resizer
Resize JPG, PNG, and WebP images online for free. Adjust dimensions, aspect ratio, and output format directly in your browser.