ToolsFam / Privacy-first browser tools

Browser-Based Developer Tools That Respect Your Workflow

Fast free tools for JSON, APIs, PDFs, images, SEO, encodings and web assets. Tools run locally where the browser can handle the job, avoiding unnecessary uploads and keeping daily developer work fast.

Runs locally where possibleNo unnecessary uploadsFast browser-native workflowsFree access

API Playground

Test REST APIs in seconds, inspect JSON responses, save workflows and understand proxy behavior without installing a desktop client.

Proxied requestsAuto chartsShareable URLs

Open API Playground

GETapi.example.com / 142ms

"status": "success"

"data": [1, 4, 9, 16]

New Featured Tool

Barcode Generator

Create scannable EAN-13, EAN-8 and Code 128 barcode SVGs with clean label styling and export-ready output.

Open Barcode Generator

Developer Tools

17 tools

API Playground

Test REST APIs, inspect responses, save requests and debug HTTP workflows in the browser

Developer Tools

JSON Formatter

Format, validate, minify and debug JSON from APIs, configs, webhooks and logs

Developer Tools

Mock API Generator

Generate JSONPlaceholder-style fake REST API responses for frontend testing and demos

Developer Tools

YAML to JSON

Convert YAML configs into clean JSON for APIs, Kubernetes, CI files and app settings

Developer Tools

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 strings, including URL-safe payloads

Developer Tools

URL Encoder / Decoder

Encode and decode URLs, query parameters, Unicode text and percent-encoded strings

Developer Tools

UUID Generator

Generate secure UUID v4 values for databases, test data, logs and application IDs

Developer Tools

Hash Generator

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes for text and checksum workflows

Developer Tools

Unix Timestamp Converter

Convert Unix timestamps to readable dates and convert local dates back to epoch time

Developer Tools

JSON to CSV Converter

Convert JSON arrays into CSV tables with headers, delimiters and one-level nested flattening

Developer Tools

CSS Gradient Generator

Design linear, radial and conic CSS gradients with live preview, presets and copyable CSS

Developer Tools

Box Shadow Generator

Build layered CSS box shadows visually with live preview, inset mode and copyable CSS

Developer Tools

Regex Tester

Test JavaScript regular expressions against sample text and inspect live matches.

Developer Tools

URL Slug Generator

Create clean SEO-friendly URL slugs from titles, product names, headings and filenames.

Developer Tools

RGB HEX Converter

Convert CSS colors between HEX, RGB and HSL values for design systems and frontend code.

Developer Tools

Markdown Preview

Preview Markdown headings, lists, links and code as clean HTML before publishing.

Developer Tools

CSS Minifier

Minify CSS by removing comments, whitespace and unnecessary spacing for smaller stylesheets.

Developer Tools

Code Playgrounds

4 tools

HTML CSS JS Playground

Write HTML, CSS and JavaScript in the browser with live preview and console output

Code Playgrounds

JavaScript Playground

Run JavaScript snippets safely in the browser for learning, practice and quick debugging

Code Playgrounds

TypeScript Playground

Compile TypeScript to JavaScript and run it instantly with readable output and errors

Code Playgrounds

SQL Playground

Practice SQLite queries in your browser with sample tables, joins and result grids

Code Playgrounds

PDF Tools

9 tools

PDF Merger

Combine multiple PDF files into one organized document directly in your browser

PDF Splitter

Extract pages or split large PDF documents into smaller files without uploading them

PDF Compressor

Reduce PDF file size for email, uploads and sharing while keeping documents readable

PDF to Image

Convert PDF pages into high-quality PNG or JPG images for previews, slides and sharing

Image to PDF

Convert JPG, PNG and WebP images into a single PDF document with browser-side processing

Rotate PDF Pages

Rotate one page, selected page ranges or an entire PDF and download the corrected document

Delete PDF Pages

Remove blank, duplicate or unwanted pages from PDF files without uploading documents

Reorder PDF Pages

Rearrange PDF page order using page lists and ranges for scans, packets and reports

PDF Metadata Editor

Edit PDF title, author, subject and keywords before sharing or archiving documents

Image Tools

10 tools

Image Resizer

Resize images by width, height or scale for websites, social posts, email and uploads

Image Format Converter

Convert images between JPG, PNG, WebP and other common formats in the browser

Image Compressor

Compress images for faster websites, smaller uploads and better Core Web Vitals

Image Cropper

Crop images to custom dimensions or aspect ratios for thumbnails, products and profiles

Color Picker

Pick colors from images and convert them into HEX, RGB and HSL values for design work

Mini Image Editor

Rotate, flip and export images quickly with a clean browser-based editing workspace

Image Watermark Tool

Add text watermarks to images with position, opacity and size controls

Image Filter Editor

Adjust brightness, contrast, saturation and grayscale with live preview and export

Screenshot Beautifier

Turn plain screenshots into polished shareable images with frames, padding and shadows

Website Screenshot Tool

Capture public website screenshots in desktop, tablet and mobile viewport sizes

SEO & Web Tools

6 tools

Meta Tag Generator

Generate SEO title, description, Open Graph and Twitter card meta tags for webpages.

SEO & Web Tools

Robots.txt Generator

Create robots.txt directives and sitemap references for search engines and crawlers.

SEO & Web Tools

XML Sitemap Generator

Generate a simple XML sitemap from a list of URLs for search engine discovery.

SEO & Web Tools

Keyword Density Checker

Measure repeated terms and keyword density in SEO copy using exact browser-side counting.

SEO & Web Tools

Schema Markup Generator

Generate JSON-LD Organization, WebSite and Article schema snippets for SEO markup.

SEO & Web Tools

SERP Snippet Preview

Preview Google-style title, URL and meta description snippets before publishing pages.

SEO & Web Tools

Security & Privacy

8 tools

JWT Decoder

Decode JWT headers and payloads locally so tokens, claims and expiry dates are easy to inspect.

Security & Privacy

Password Generator

Generate strong random passwords locally with browser crypto for accounts, test users and vaults.

Security & Privacy

Passphrase Generator

Generate memorable multi-word passphrases for secure logins and recovery workflows.

Security & Privacy

SHA-256 Checksum Generator

Create SHA-256 hashes for text verification, checksums and integrity comparisons in the browser.

Security & Privacy

Password Strength Checker

Check password length, character variety and common weakness signals without sending it anywhere.

Security & Privacy

Basic Auth Header Generator

Create HTTP Basic Authorization headers from a username and password for API testing.

Security & Privacy

CORS Header Generator

Generate common CORS response headers for frontend API development and browser debugging.

Security & Privacy

CSP Header Generator

Generate a starter Content Security Policy header to harden websites and reduce XSS risk.

Security & Privacy

Data Tools

6 tools

CSV to JSON Converter

Convert CSV rows into JSON arrays for imports, API payloads, spreadsheets and data cleanup.

JSON Minifier

Validate and minify JSON into compact payloads for configs, APIs and embedded data.

JSON Path Finder

Flatten nested JSON into readable object paths for debugging API responses and configs.

HTML Escape / Unescape

Escape HTML entities for safe display or decode entity-encoded snippets back to readable markup.

HTML to Text

Strip HTML tags and extract readable plain text from copied snippets, emails and rich content.

URL Parser

Break URLs into protocol, host, path, query parameters and hash fragments for debugging.

Text Tools

6 tools

Regex Tester

Test JavaScript regular expressions against sample text and inspect live matches.

Developer Tools

Markdown Preview

Preview Markdown headings, lists, links and code as clean HTML before publishing.

Developer Tools

HTML Escape / Unescape

Escape HTML entities for safe display or decode entity-encoded snippets back to readable markup.

HTML to Text

Strip HTML tags and extract readable plain text from copied snippets, emails and rich content.

URL Slug Generator

Create clean SEO-friendly URL slugs from titles, product names, headings and filenames.

Developer Tools

Keyword Density Checker

Measure repeated terms and keyword density in SEO copy using exact browser-side counting.

SEO & Web Tools

Converter Tools

9 tools

YAML to JSON

Convert YAML configs into clean JSON for APIs, Kubernetes, CI files and app settings

Developer Tools

JSON to CSV Converter

Convert JSON arrays into CSV tables with headers, delimiters and one-level nested flattening

Developer Tools

CSV to JSON Converter

Convert CSV rows into JSON arrays for imports, API payloads, spreadsheets and data cleanup.

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 strings, including URL-safe payloads

Developer Tools

URL Encoder / Decoder

Encode and decode URLs, query parameters, Unicode text and percent-encoded strings

Developer Tools

Image Format Converter

Convert images between JPG, PNG, WebP and other common formats in the browser

PDF to Image

Convert PDF pages into high-quality PNG or JPG images for previews, slides and sharing

Image to PDF

Convert JPG, PNG and WebP images into a single PDF document with browser-side processing

RGB HEX Converter

Convert CSS colors between HEX, RGB and HSL values for design systems and frontend code.

Developer Tools

Web Assets

5 tools

Barcode Generator

Create scannable EAN-13, EAN-8 and Code 128 barcodes with polished SVG styles

QR Code Generator

Generate a scannable QR-style code preview for URLs, text and contact snippets.

UTM Builder

Build campaign URLs with source, medium, campaign, term and content tracking parameters.

Open Graph Preview

Preview title, description and image text for social sharing cards before pages go live.

Favicon Generator

Create a simple SVG favicon from initials, colors and brand text for websites and prototypes.