Free Web Apps & Microservices — Developer Resource Hub

Built by Serhii Hrekov · Production-grade tools with live demos and full documentation.

Discover a collection of robust web applications, microservices and APIs built for performance and scale. Each one includes comprehensive documentation and live demonstrations.

Filters 37 apps

OR

ANDClear All

linkwebtoolspdfwebtoolebookproductivityimagesdesignsocial mediadocument-toolutilitydevelopermarkdowntexttoolsword to pdfadsenseseonetworkapitext-processingjavascriptmdxcollapsibleadmonitionsweb developmentyoutubevideotoolsearchpwaiconsmarketingwebdevclient-sideaccessibilitycssimagephotographyjwtsecuritydevtoolbarcodeqrcodeqrredirectdomainwhoisdnschrome extensionautomationbrowser toolsfilecompressionbackground removalphoto editingstring generator

Bookmark Link Checker - Find Broken Links in Your Bookmarks

Upload your browser bookmark HTML file and instantly check every link for broken URLs, redirects, and timeouts. Supports Chrome, Firefox, Safari, and Edge. Export results to CSV, JSON, TXT, or HTML.

linkwebtools

EPUB to PDF Converter - Free, Private, In-Browser

Convert EPUB ebooks to PDF instantly in your browser. No file upload, no account needed. Preserves text, images, and formatting from any EPUB file.

pdfwebtoolebookproductivity

Instagram Image Resizer

Resize your images easily for Instagram and other social media platforms by adding a transparent, black, white, or blurred background.

imagesdesignsocial media

Free Online PDF Merger

A fast and secure web tool to combine multiple PDF files into one single document locally in your browser.

pdfdocument-toolutility

Free UUID Generator & Decoder (v1, v4, v5, v7)

Generate random, time-ordered, or name-based UUIDs instantly in your browser. Decode and inspect existing UUIDs.

toolsdeveloper

Markdown to PDF Converter

Convert Markdown to high quality PDF format securely inside your browser. Support for code blocks, tables, and standard MD syntax.

pdfwebtoolmarkdown

Rich Text to PDF Converter

Convert Word Docs, Google Docs, or formatted HTML into a high-quality PDF file right in your browser. Keep your bolding, colors, headings, and lists intact.

pdfwebtooltexttoolsproductivityword to pdf

Free Text to PDF Converter Online

Instantly convert your text into a PDF file completely free, safely within your browser. No sign-up required and your data never leaves your device.

pdftexttoolsproductivitywebtool

Google AdSense Revenue & Net Worth Estimator

Estimate how much a website makes with Google AdSense and what its net worth is.

adsenseseotools

IP Tracker - What is my IP?

Instantly find out your public IP address, location, ISP, ASN, and map coordinates. Track any IPv4 or IPv6 address for free.

networkapi

Website Status Checker — HTTP Status, Response Time & Server Headers

Check any website's live HTTP status code, server response time (TTFB), server software, and raw headers instantly. Diagnose downtime, slowness, and redirects.

webtools

Emoji Detector API & Tool

Scan, detect, and remove emojis from any text string. Use our free web tool or API to clean up your datasets for machine learning or database storage.

apitext-processingjavascript

Add Collapsible Admonitions in Markdown and MDX

Add collapsible admotions to your MD, MDX content.

markdownmdxcollapsibleadmonitionsweb development

YouTube Shorts Downloader

Download YouTube Shorts easily in high quality for offline viewing or content repurposing without installing any software.

youtubevideotool

Image Search Launcher Tool

A pure client-side image search web app. Launch reverse image searches or text searches across multiple image search engines instantly.

toolsimagessearch

Website Icon & Favicon Checker

Fetch, inspect, and download all associated icons (favicons, Apple Touch icons) and related meta content to debug cache issues or missing tags.

toolswebwebtoolseopwaicons

Schema Markup & JSON-LD Validator

Validate and visualize JSON-LD structured data on any webpage. Fix syntax errors and ensure your Rich Snippets are ready for Google.

seotools

Open Graph & Twitter Card Checker

Validate your meta tags and see how your links will look natively on social media platforms like Twitter, Facebook, and LinkedIn.

seomarketingtools

Free Online Accessible Color Palette Generator & Contrast Checker

Generate 5-color palettes that are fully compliant with WCAG accessibility standards. Discover safe color combinations with our comprehensive contrast matrix.

designtoolswebdevwebtoolclient-sideaccessibilitycss

Free Online Image Color Picker

Upload or paste an image to extract exact color pixels in HEX, RGB, HSL, HWB, and CMYK. Features a magnifying loupe and color history. Completely client-side.

designtoolswebdevwebtoolclient-sideimagephotography

Free Online Color Converter (RGB, HEX, HSL, HWB, CMYK)

Instantly convert colors between RGB, HEX, HSL, HWB, and CMYK. Includes WCAG contrast ratio checker, accessibility badges, tints & shades palette, and CSS named color support.

designtoolswebdevwebtoolclient-sidecssaccessibility

YouTube Toolkit - Title, Metadata & Thumbnail Extractor

Extract the title, full metadata (tags, description, channel info), and download thumbnails in all resolutions from any YouTube video URL instantly.

youtubeutilitywebtoolseoimagemarketing

Google AdSense Checker

Enter a website URL to check for AdSense ownership verification, scripts, and ad units.

adsenseseoapiwebtoolmarketing

JWT Secret Key Generator

Generate cryptographically secure secret keys for JWT authentication with one-click formatting for .env files.

apijwtsecuritydevtoolwebtool

Strong Password Generator

A secure microservice for generating highly random and strong passwords.

utilitywebtoolsecurityclient-side

Free Online Barcode Generator (Code 128, EAN-13, UPC-A)

Generate 1D barcodes in Code 128, EAN-13, UPC-A, and more formats instantly. Download as PNG for product labels, inventory, shipping, and asset tracking.

apibarcodeutilitydevtoolwebtool

QR Code Generator

Generate QR codes instantly using our interactive QR code generator powered by a dedicated API backend. Enter text or a URL to see your QR code created in real time! Download the generated QR code as a PNG image.

apiqrcodeutilitydevtoolwebtoolqr

Link Redirect Tracer

Follow the full route of a URL, revealing all redirects and the final destination.

utilitywebtooldevtoollinkredirect

Domain Lookup — WHOIS, DNS Records & Registration Info

Look up WHOIS records, DNS configuration, registration dates, expiration, and nameservers for any domain in one search.

utilitywebtooldevtooldomainwhoisdns

Keep Scrolling - Auto-Scroll Chrome Extension

Keep Scrolling is a lightweight Chrome extension that automatically advances to the next video so you can watch hands-free.

chrome extensionautomationbrowser tools

Image Comparison Creator

Free online tool to combine two images side-by-side. Supports Before/After, VS, Now/Then, and custom text labels. Download instantly - 100% client-side.

imagewebtoolutilityclient-side

Online GZIP Compressor

A fast, privacy-focused tool to compress and decompress files using the GZIP algorithm directly in your browser.

utilitywebtooldevtoolfilecompressionclient-side

Clipboard Image Downloader — Paste & Save as PNG

Paste any image from your clipboard (Ctrl+V / Cmd+V) and download it instantly as a PNG. Runs entirely in your browser — no upload, no account, no server.

utilitywebtoolimageclient-side

ShrinkItPlease

Compress your images seamlessly with a simple drag-and-drop. It's fast, efficient, and dev-friendly. Reduce the weight of image up to 90%

apiimagecompressionutilitydevtoolwebtool

NoBackgroundPlease

A fast, seamless microservice for removing image backgrounds via API and interactive UI.

apiimagebackground removalutilityphoto editingwebtool

Random String Generator API

A live demo and microservice for generating random strings with customizable options such as length, character types, and spaces.

apistring generatorutilitydevtoolwebtool

Metacard API

Metacard is an API service for generating dynamic, social-media-ready thumbnail images for blogs and websites. API included.

apiimagesocial mediautilitydevtoolwebtool