209+ private browser tools
200+ free tools. No AI. No uploads.
Convert, format, and hash files in this tab. Your data never leaves your device.
Browse all tools
Pick a category, then open a tool. Everything runs in your browser. Full directory
Privacy
Processing happens in your browser. We do not receive your files.
Speed
No upload wait. Tools run locally as soon as the page loads.
No account
Nothing to sign up for. Open a tool and use it.
Free forever
Utilities stay free. The site is supported by ads, not paywalls.
Categories
Each category is a landing page. Tools inside it run in your browser. No signup. No AI. Files are not uploaded to our servers.
Image tools
Browser-based image tools for converting, compressing, and cleaning photos. Processing happens on your device. We do not receive your files.
29 tools
PDF tools
Client-side PDF utilities: merge images into a PDF or export selected pages as JPEGs. pdf.js and pdf-lib run in this tab.
20 tools
Data tools
Formatters and converters for structured data. Paste or drop a file; parsing stays in memory.
22 tools
Developer tools
Small developer utilities that run with Web Crypto and in-page parsers. No account. No upload API.
99 tools
Text tools
Text utilities for writing and code. Comparison and conversion happen in the page.
18 tools
Color tools
HEX, RGB, HSL conversion, WCAG contrast, palettes, and color names — all in this tab.
7 tools
Markdown tools
Visual table editors and Markdown generators that run entirely in this tab. Pipe syntax is produced locally.
5 tools
SEO tools
Client-side SEO utilities: sitemap XML, robots.txt, JSON-LD, and snippet checks. Nothing is fetched from your origin.
12 tools
How it works
Every tool is a static page plus client-side code. There is no file upload API.
1
Open a tool
Choose a converter, formatter, or calculator. The page is the app.
2
Process locally
Your browser does the work. Nothing is posted to our servers.
3
Download the result
Save the output to your device. We never see your files.
Popular tools
The first set of utilities. Pages will go live as each tool is built.
Compress Image
Compress JPG, PNG or WebP to a target file size in your browser. Your files never leave your device. Free and private.
HEIC to JPG
Convert HEIC and HEIF photos to JPG in your browser. No upload. No account. Your files never leave your device.
HEIC to PNG
Convert HEIC (iPhone) images to PNG in your browser. No uploads or accounts. Your photo stays on your device.
AVIF to JPG
Convert AVIF images to JPEG in your browser. Decode and re-encode on-device. Your files never leave the page.
Images to PDF
Merge JPG/PNG (and similar) into one PDF in the browser. Add images, reorder, download. No uploads or watermarks.
JSON to CSV
Convert JSON to CSV in your browser. Paste an array or object; nested keys are flattened. Data is not sent to a server.
CSV to JSON
Convert CSV to JSON in your browser. Paste or drop a file; choose headers and delimiter. Local only.
JWT inspector
Decode and inspect JWTs in your browser. Header, payload, and signature. Optional local verify if you paste a key. The token is not sent anywhere.
Cron expression explainer
Turn a cron expression into plain English and upcoming run times. Runs in the browser.
JSON to YAML | JSON ↔ YAML
Convert JSON to YAML (and YAML to JSON) in the browser. Structure and indentation preserved. Config never uploaded.
Image to Base64
Image file → Base64 string in the browser. Copy or embed. No server.
Base64 to image
Base64 string → image download. Decode locally.
Remove EXIF data
Clean metadata from images in your browser. Photos are not uploaded; processing stays on your device.
Secure password generator
Generate strong passwords with the Web Crypto API in your browser. Nothing is sent or stored on a server.
SHA256 checksum
Calculate SHA-256 checksums of files or text with Web Crypto in your browser. No file uploading.
Markdown to HTML
Convert Markdown to HTML with a live preview in your browser. Text is not sent to a server.
UUID generator
Generate version 4 UUIDs with browser cryptographic randomness. Generation is local.
Regex tester
Test JavaScript regular expressions against text in your browser. Patterns and samples stay local.
Markdown Table Maker – Private Visual Table Builder
Build Markdown tables visually in your browser. Add rows, set alignment, paste from Excel. No upload, no account, no AI. Instant GFM output.
Markdown Table Creator – Build Tables Privately in Your Browser
Create Markdown tables instantly with a visual editor. Paste data, set alignment, copy GFM syntax. 100% browser-based, zero uploads, no AI.
Table Markdown Generator – From Data to Clean Markdown
Paste CSV, Excel data, or build visually — get perfect Markdown tables instantly. 100% client-side, no upload, free forever.
ASCII to Binary Converter – Private Text-to-Binary Tool
Convert ASCII text to 8-bit binary instantly in your browser. No upload, no account, no AI. Clean spaced or compact output.
Binary to ASCII Converter – Private Binary Decoder
Decode 8-bit binary code into readable ASCII text. 100% client-side, no upload, free. Handles spaced or continuous binary.
Image Resizer
Resize any image by pixels or percentage in your browser. Your files never leave your device. Free, private, no upload required.
Image Cropper
Crop any image by selecting a region in your browser. Your files never leave your device. Free, private, no upload.
Image to WebP
Convert JPG or PNG to WebP in your browser. Your files never leave your device. Free and private.
PNG to JPG
Convert PNG images to JPG with quality control in your browser. Your files never leave your device. Free and private.
Favicon Generator
Turn one image into a favicon pack: ICO, 16×16, 32×32, Apple 180, Android 192 and 512. Runs in your browser. No upload.
Merge PDF
Merge multiple PDFs into one file in your browser. Your files never leave your device. No upload, no account, 100% private and free.
Split PDF
Split a PDF into separate pages or custom ranges in your browser. Your files never leave your device. Free, private, no upload required.
JSON Formatter
Pretty-print and format JSON in your browser. Your data never leaves your device. Free, private, no upload required.
JSON Validator
Validate JSON syntax and find errors instantly in your browser. Your data never leaves your device. Free and private.
URL Encoder Decoder
Encode or decode URL strings and query parameters in your browser. Your data never leaves your device. Free and private.
Base64 Encoder Decoder
Encode text to Base64 or decode Base64 to text in your browser. Your data never leaves your device. Free and private.
Word Counter
Count words, characters, sentences and paragraphs instantly in your browser. Your text never leaves your device. Free, private, no upload.
Character Counter
Count characters with and without spaces instantly in your browser. Your text never leaves your device. Free, private, no upload.
Color Converter
Convert between HEX, RGB, HSL and CMYK in your browser. Your data never leaves your device. Free and private.
Contrast Checker
Check WCAG color contrast ratio between foreground and background in your browser. Your data never leaves your device. Free and private.
BLAKE3 Hash Generator – Private & Lightning Fast
Generate BLAKE3 hashes (text or file) with keyed & derive-key modes. 100% browser-based, no upload, no AI. Free & private.
SHA-3 Hash Generator – All Variants
Generate SHA-3-224, SHA-3-256, SHA-3-384 or SHA-3-512 hashes. Client-side only, no upload.
File Hash Calculator – Private Multi-Algorithm Checksums
Hash any file with SHA-224/256/512, SHA-3, BLAKE3, CRC32 and more. 100% client-side. Files never leave your browser.
Image Compressor – Private Quality Control
Compress JPG, PNG, WebP with a live quality slider. 100% client-side. Files never leave your browser. Free, no watermark.
Image Format Converter Hub
Convert between popular image formats in your browser. No upload, free, no watermark.
Compress PDF – Private & Fast
Compress PDF files in your browser. Lower file size while keeping quality. Private, free, no watermark.
Unit Converter
Convert between metric and imperial units instantly. Private, accurate, free.
Bank statement to CSV
Reformat bank statement text to CSV locally. 100% private, no-upload processing with zero server latency.
PDF redactor
Permanently black out sensitive PDF text locally. 100% private, no-upload processing with zero server latency.
Logcat filter
Filter huge Android Logcat files instantly in your browser. 100% private, no-upload processing with zero server latency.
Binaural beats generator
Mix ambient noise and binaural focus tones locally. 100% private, no-upload audio with zero server latency.
.env validator
Validate .env syntax and duplicate keys locally. 100% private, no-upload processing with zero server latency.
Cron visualizer
Visualize cron schedules on a calendar grid locally. 100% private, no-upload processing with zero server latency.
Markdown to rich text
Copy Markdown as formatted rich text locally. 100% private, no-upload conversion with zero server latency.
API header cleaner
Clean API tokens, Authorization headers and cookies locally. 100% private, no-upload processing with zero server latency.
Text to TXT
Type or paste text and download a .txt file locally. 100% private, no-upload processing with zero server latency.
CSV editor
Paste CSV, edit cells in a grid, and download CSV or PDF locally. 100% private, no-upload processing with zero server latency.
Text to PDF
Convert pasted text to a PDF locally. 100% private, no-upload processing with zero server latency.
robots.txt parser and tester
Parse robots.txt locally against RFC 9309. Group user-agents, flag syntax issues, and test a URL. Nothing is fetched or uploaded.
JSON-LD schema validator
Paste JSON-LD. Check @context, @type, and common required properties for WebApplication, FAQPage, HowTo, and Article.
CSP hash and nonce generator
SHA-256 hash inline scripts for CSP, or mint a cryptographically random nonce. Web Crypto in this tab.
OAuth PKCE generator
Create a code_verifier and S256 code_challenge with Web Crypto. Nothing is sent to an auth server from this page.
CSS gradient generator
Build linear or radial CSS gradients. Copy the background-image. Preview in this tab.
Image color palette extractor
Drop an image. Sample pixels on a canvas and cluster frequent colors. Files never leave the device.
CSV to SQL INSERT
Turn CSV into INSERT statements. Identifiers are quoted. Runs in the browser.
Recently added
Newest utilities in the catalog. Same rule: processing stays in the tab.
Box-shadow generator
Layer CSS box-shadows with offset, blur, spread, and color. Copy the declaration.
Breadcrumb schema auditor
Paste BreadcrumbList JSON-LD. Check position order, missing item URLs, and name gaps.
Color blindness simulator
Drop an image and simulate protanopia, deuteranopia, tritanopia, and achromatopsia on a canvas.
Color contrast matrix
Paste a list of hex colors. See WCAG 2.1 contrast ratios for every pair. Local math.
Cookie string auditor
Parse Cookie or Set-Cookie strings. Flag missing Secure/HttpOnly/SameSite and oversize values.
CORS preflight debugger
Simulate an OPTIONS preflight from origin, method, and request headers. No network call.
More tools coming
Same rules every time: client-side only, no AI, no file uploads.