every tool is free. no signup. no limits.
Paste your JSON and instantly format, validate, or minify it.
Build cron expressions visually or paste one to decode it.
Check if your domain's email authentication is set up correctly.
Generate QR codes with custom colors, rounded corners, and logo embed.
Compress images up to 90% smaller without losing quality.
Convert images between PNG, JPG, WebP, BMP, and GIF instantly in your browser.
Convert each page of a PDF into high-quality PNG or JPG images.
Merge multiple PDF files into one document.
Convert multiple images into a single PDF document.
Split a PDF into individual pages or custom ranges.
Pick colors, generate harmonious palettes, and export as HEX, RGB, or HSL.
Generate strong, random passwords with customizable length and character sets.
Count words, characters, sentences, paragraphs, and reading time in real-time.
Generate lorem ipsum placeholder text by paragraphs, sentences, or words.
Convert HEIC/HEIF photos from iPhone to universal JPG format.
Crop images with preset aspect ratios or freeform selection.
Generate favicons at every size from any image.
Encode text or files to Base64, or decode Base64 back to text and files.
Convert SVG files to high-resolution PNG at any scale.
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes for text or files.
Add text or logo watermarks to photos with custom position, opacity, and tiling.
Live regex tester and debugger.
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, and more.
Resize photos to exact dimensions with aspect ratio lock.
Compare two texts side by side with line-by-line diff highlighting.
Generate SEO meta tags, Open Graph, and Twitter Card HTML.
Encode or decode URL strings in real time.
Convert between Unix timestamps and human-readable dates.
Build linear and radial CSS gradients visually.
Preview how your link appears on Facebook, Twitter, LinkedIn, Discord, and Slack.
Convert JSON arrays of objects to CSV with auto-detected headers.
Convert Markdown to HTML with a live preview.
Calculate aspect ratios and resize dimensions while keeping proportions.
Generate v4 UUIDs instantly.
Build CSS box shadows visually with live preview.
Generate a robots.
Generate placeholder images with custom dimensions, colors, and text.
Drop a screenshot and frame it in a device mockup — iPhone, MacBook, iPad, Browser, or Android.
Convert text to binary, hexadecimal, and decimal byte values in real time.
See your public IP address, location, ISP, and timezone instantly.
Full-featured Markdown editor with toolbar, live preview, word count, and export.
Persimmon is a collection of 41 free online tools for developers, designers, content creators, and anyone who works with files on the web. Every tool runs directly in your browser — your files and data never leave your device.
No accounts, no subscriptions, no limits. Open a tool, use it, and move on. Whether you need to merge PDFs, compress images, format JSON, generate QR codes, or convert file formats, there is a dedicated tool here for the job.
Every tool is built for speed and privacy. Processing happens client-side using your browser's built-in capabilities, so nothing is uploaded to a server. This makes Persimmon safe for sensitive documents, proprietary code, personal photos, and confidential business data.
Merge, split, and convert PDFs. Free and client-side.
Compress, convert, crop, resize, and watermark. Runs in your browser.
JSON, regex, hashing, encoding, and debugging utilities.
Colors, gradients, shadows, and layout helpers.
Word counts, case conversion, passwords, QR codes, and more.
100% Client-Side
Your files never leave your browser. No uploads, no servers, no data collection.
No Signup Required
Every tool works immediately. No accounts, no email verification, no paywalls.
Fast and Lightweight
Tools load instantly and process files using your device's own computing power.
Works on Any Device
Desktop, tablet, or phone — every tool works in any modern web browser.