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Show HN: DH Tools – 40 client-side developer and productivity tools

DH Tools launched a suite of 46+ client-side developer and productivity utilities that run entirely in the browser, including PDF compression, image format conversion, JSON formatting, and AI OCR that extracts tabular images and invoices into editable Excel (.xlsx) spreadsheets. The tools process files locally with zero data stored, according to the developer, and include an AI-based photo background remover alongside networking utilities such as an IP lookup with OpenStreetMap geolocation. The suite spans PDF, image, audio, barcode, and QR code functions, with PDF compression advertised as reducing file size by up to 85%.

by read9 min views1 publishedSep 19, 2026
Show HN: DH Tools – 40 client-side developer and productivity tools
Image: source

All-in-one suite for PDFs, image editing, AI OCR, JSON, networking, and developer utilities. Your files never leave your browser.

46+ Online Tools

0 Data Stored

Cloudflare Edge 0ms

100% Client-Side

🔥 Most Popular & Trending Tools #

High Traffic [🔥 Top Feature

☆](https://denizlihub.com/pdf-compressor/)

Compress PDF Online - Free PDF Size Reducer

Compress PDF files online while preserving optimal quality. Reduce PDF file size by up to 85% in your browser without up to any server.

[🔥 Popular & Free

☆](https://denizlihub.com/ppt-to-pdf/)

PowerPoint to PDF Converter (PPTX to PDF)

Convert PowerPoint (.pptx, .ppt) presentations into high-resolution multi-page PDF documents locally in your browser with zero server uploads.

[🔥 Top Search

☆](https://denizlihub.com/pdf-to-image/)

PDF to PNG & PDF to JPG Converter

Convert all PDF pages into high-resolution (300 DPI) PNG or JPG images with 1-click batch .ZIP download. 100% private in-browser.

[🔥 Most Searched

☆](https://denizlihub.com/image-to-pdf/)

PNG to PDF & JPG to PDF Converter

Combine JPG, PNG, and WebP images into a single formatted PDF document with customizable page sizes.

[🔥 Batch & ZIP

☆](https://denizlihub.com/image-format-converter/)

PNG to JPG, JPG to PNG & WebP Image Converter

Convert images between PNG, JPG, and WebP formats in batch with quality control and 1-click .ZIP archive download.

[🔥 AI OCR

☆](https://denizlihub.com/image-to-excel/)

Image to Excel (AI OCR Table Converter)

Extract tabular images, invoices, and physical charts into editable Excel (.xlsx) spreadsheets via AI OCR.

[🔥 Most Popular

☆](https://denizlihub.com/pdf-merger/)

Merge PDF Online & PDF Combiner

Merge and combine multiple PDF documents into a single file with custom page ordering. 100% private.

[🔥 Popular

☆](https://denizlihub.com/excel-to-pdf/)

Excel to PDF Converter (XLSX to PDF)

Convert Excel (.xlsx, .xls) and CSV sheets into styled, printable PDF documents directly in browser.

[🔥 Office

☆](https://denizlihub.com/pdf-to-excel/)

PDF to Excel Converter (Extract PDF to XLSX)

Extract tables, rows, and structured financial data from PDF files into editable Excel (.xlsx) spreadsheets.

[🔥 Batch & ZIP

☆](https://denizlihub.com/image-compressor/)

### Batch Image & WebP Compressor (ZIP)

Compress 20+ photos simultaneously, convert to WebP/JPG with quality control, and download in a single .ZIP archive.

[🔥 AI Magic

☆](https://denizlihub.com/image-bg-remover/)

Photo Background Remover (AI & Magic Wand)

Remove photo backgrounds using AI deep learning or point-and-click Magic Wand with instant transparent PNG download.

[🔥 Carbon Studio

☆](https://denizlihub.com/code-to-image/)

Code & Text to Image Studio (Carbon Style)

Turn source code and quotes into beautiful macOS-framed graphics with gradients, syntax themes, and 2x Retina PNG export.

[🔥 E-Commerce
☆](https://denizlihub.com/barcode-generator/)

### Barcode & Product Label Generator (EAN-13, UPC)

Generate printable barcode labels in EAN-13, Code 128, UPC-A, and Code 39 formats for retail and inventory.

[🔥 4K / HD

☆](https://denizlihub.com/thumbnail-down/)

Video Thumbnail Previewer & HD Cover Viewer

Preview and view high-definition (1080p, 720p) video cover thumbnails directly in your browser.

[New

☆](https://denizlihub.com/audio-cutter/)

### Audio & MP3 Cutter (Ringtone Maker)

Trim and cut MP3, WAV, and audio tracks visually on an interactive waveform. Perfect for ringtones and sound bites.

[⚡ Live Map

☆](https://denizlihub.com/ip-lookup/)

IP Lookup & Live Map Locator

Inspect your public IP address, ISP provider, ASN, latency ping, and interactive OpenStreetMap geolocation.

[🔥 Developer

☆](https://denizlihub.com/json-formatter/)

JSON Formatter & Validator

Format, validate, beautify, and minify raw JSON with syntax error detection and color highlighting.

[🔥 Popular

☆](https://denizlihub.com/qr-generator/)

QR Code Generator (WiFi, Link & Text)

Generate instant, high-resolution QR codes for websites, Wi-Fi networks, WhatsApp, and text notes with 1-click download.

[🔥 New Studio

☆](https://denizlihub.com/voice-recorder/)

Online Voice Recorder & Audio Studio

Record high-fidelity voice memos directly from your microphone with live oscillating waveform and 1-click WAV / MP3 export.

[🔥 Finance & Tax

☆](https://denizlihub.com/kdv-calculator/)

Turkish VAT, Tax & Invoice Calculator

Calculate Turkish VAT (KDV), withholding tax (Stopaj), VAT tevkifat fractions (5/10, 7/10), and freelance SMM gross-to-net invoices.

🗂️ All Tool Categories #

[🔥 Top Feature

☆](https://denizlihub.com/pdf-compressor/)

Compress PDF Online - Free PDF Size Reducer

Compress PDF files online while preserving optimal quality. Reduce PDF file size by up to 85% in your browser without up to any server.

[🔥 Popular & Free

☆](https://denizlihub.com/ppt-to-pdf/)

PowerPoint to PDF Converter (PPTX to PDF)

Convert PowerPoint (.pptx, .ppt) presentations into high-resolution multi-page PDF documents locally in your browser with zero server uploads.

[🔥 Top Search

☆](https://denizlihub.com/pdf-to-image/)

PDF to PNG & PDF to JPG Converter

Convert all PDF pages into high-resolution (300 DPI) PNG or JPG images with 1-click batch .ZIP download. 100% private in-browser.

[🔥 Most Searched

☆](https://denizlihub.com/image-to-pdf/)

PNG to PDF & JPG to PDF Converter

Combine JPG, PNG, and WebP images into a single formatted PDF document with customizable page sizes.

[🔥 Batch & ZIP

☆](https://denizlihub.com/image-format-converter/)

PNG to JPG, JPG to PNG & WebP Image Converter

Convert images between PNG, JPG, and WebP formats in batch with quality control and 1-click .ZIP archive download.

[🔥 AI OCR

☆](https://denizlihub.com/image-to-excel/)

Image to Excel (AI OCR Table Converter)

Extract tabular images, invoices, and physical charts into editable Excel (.xlsx) spreadsheets via AI OCR.

[🔥 Most Popular

☆](https://denizlihub.com/pdf-merger/)

Merge PDF Online & PDF Combiner

Merge and combine multiple PDF documents into a single file with custom page ordering. 100% private.

[🔥 Popular

☆](https://denizlihub.com/excel-to-pdf/)

Excel to PDF Converter (XLSX to PDF)

Convert Excel (.xlsx, .xls) and CSV sheets into styled, printable PDF documents directly in browser.

[🔥 Office

☆](https://denizlihub.com/pdf-to-excel/)

PDF to Excel Converter (Extract PDF to XLSX)

Extract tables, rows, and structured financial data from PDF files into editable Excel (.xlsx) spreadsheets.

[🔥 Batch & ZIP

☆](https://denizlihub.com/image-compressor/)

### Batch Image & WebP Compressor (ZIP)

Compress 20+ photos simultaneously, convert to WebP/JPG with quality control, and download in a single .ZIP archive.

[🔥 AI Magic

☆](https://denizlihub.com/image-bg-remover/)

Photo Background Remover (AI & Magic Wand)

Remove photo backgrounds using AI deep learning or point-and-click Magic Wand with instant transparent PNG download.

[🔥 Carbon Studio

☆](https://denizlihub.com/code-to-image/)

Code & Text to Image Studio (Carbon Style)

Turn source code and quotes into beautiful macOS-framed graphics with gradients, syntax themes, and 2x Retina PNG export.

[🔥 E-Commerce
☆](https://denizlihub.com/barcode-generator/)

### Barcode & Product Label Generator (EAN-13, UPC)

Generate printable barcode labels in EAN-13, Code 128, UPC-A, and Code 39 formats for retail and inventory.

[🔥 4K / HD

☆](https://denizlihub.com/thumbnail-down/)

Video Thumbnail Previewer & HD Cover Viewer

Preview and view high-definition (1080p, 720p) video cover thumbnails directly in your browser.

[New

☆](https://denizlihub.com/audio-cutter/)

### Audio & MP3 Cutter (Ringtone Maker)

Trim and cut MP3, WAV, and audio tracks visually on an interactive waveform. Perfect for ringtones and sound bites.

[⚡ Live Map

☆](https://denizlihub.com/ip-lookup/)

IP Lookup & Live Map Locator

Inspect your public IP address, ISP provider, ASN, latency ping, and interactive OpenStreetMap geolocation.

[🔥 Developer

☆](https://denizlihub.com/json-formatter/)

JSON Formatter & Validator

Format, validate, beautify, and minify raw JSON with syntax error detection and color highlighting.

[🔥 Popular

☆](https://denizlihub.com/qr-generator/)

QR Code Generator (WiFi, Link & Text)

Generate instant, high-resolution QR codes for websites, Wi-Fi networks, WhatsApp, and text notes with 1-click download.

[Popular

☆](https://denizlihub.com/image-resizer/)

Image Resizer & Scaler

Resize photos and graphics by exact pixel dimensions or percentage ratio with aspect ratio lock.

[New

☆](https://denizlihub.com/image-filter-studio/)

Photo Filters & Color Studio

Fine-tune image brightness, contrast, saturation, grayscale, sepia, and blur with live canvas preview.

[Design

☆](https://denizlihub.com/css-gradient/)

CSS Gradient Generator

Create beautiful linear and radial CSS gradient backgrounds with color stops and 1-click CSS code copy.

[Design

☆](https://denizlihub.com/color-palette/)

Color Palette & Contrast Studio

Extract color codes in HEX, RGB, HSL, generate harmonic palettes, and test WCAG readability contrast.

[Client-Side
☆](https://denizlihub.com/base64-image/)

### Image to Base64 (Data URI)

Convert image files into embedded Base64 Data URI strings for HTML, CSS background-image, and JSON payloads.

[New

☆](https://denizlihub.com/image-cropper/)

Image Cropper & Rotate

Crop photos with 1:1, 16:9, 4:3 aspect ratios, rotate 90/180 degrees, and flip horizontally or vertically.

[Vector

☆](https://denizlihub.com/svg-to-png/)

SVG to High-Res PNG & Favicon

Render scalable SVG vector graphics into transparent high-resolution PNGs (512px, 1024px, 2048px) and favicons.

[PDF

☆](https://denizlihub.com/pdf-splitter/)

PDF Page Splitter & Extractor

Extract specific single pages or page ranges (e.g. 1-3, 5, 8-10) from PDF files into a new document.

[PDF

☆](https://denizlihub.com/pdf-rotator/)

PDF Page Rotator

Permanently rotate upside-down or sideways scanned PDF pages by 90, 180, or 270 degrees.

[Dev

☆](https://denizlihub.com/markdown-to-pdf/)

Markdown to PDF Document

Write or paste Markdown with live formatted preview and export as a clean, styled PDF document.

[New

☆](https://denizlihub.com/code-formatter/)

Code Formatter & Minifier (HTML/CSS/JS)

Beautify or minify HTML, CSS, and JavaScript code with customizable indentation and syntax cleanup.

[Data

☆](https://denizlihub.com/json-csv-converter/)

JSON to CSV & CSV to JSON Converter

Convert JSON arrays into Excel-compatible CSV files, or parse CSV tables into structured JSON objects.

[Client-Side
☆](https://denizlihub.com/base64-text/)

Base64 Text Encoder & Decoder

Encode plain text to Base64 or decode Base64 back to text with full UTF-8 support.

[Security

☆](https://denizlihub.com/jwt-decoder/)

JWT Token Decoder & Inspector

Decode JSON Web Token (JWT) headers and payloads, check token expiration timestamps, and inspect claims.

[Crypto

☆](https://denizlihub.com/hash-generator/)

### Hash Generator (MD5, SHA-256, SHA-512)

Generate cryptographic MD5, SHA-1, SHA-256, and SHA-512 checksum hashes using Web Crypto API.

[Fast

☆](https://denizlihub.com/uuid-generator/)

Bulk UUID & GUID v4 Generator

Generate bulk cryptographically random UUID v4 identifiers with uppercase/lowercase and hyphen options.

[Dev

☆](https://denizlihub.com/regex-tester/)

### Regular Expression (RegEx) Tester

Test and debug RegEx patterns with live match highlighting, flags, and capture group inspection.

[Diff

☆](https://denizlihub.com/diff-checker/)

Text & Code Diff Checker

Compare two text or code snippets side-by-side with color-coded diff highlighting for additions and deletions.

[Web

☆](https://denizlihub.com/url-encoder/)

URL Encoder / Decoder & Parser

Encode and decode query strings, parse query parameters into editable tables, and fix URL formatting.

[Edge API

☆](https://denizlihub.com/dns-lookup/)

### DNS Records Lookup (DoH 1.1.1.1)

Query A, AAAA, MX, TXT, and CNAME records with Cloudflare 1.1.1.1 DNS-over-HTTPS edge network.

[Edge API

☆](https://denizlihub.com/http-headers/)

HTTP Request Headers & Browser Diagnostics

Inspect HTTP request headers, User-Agent device parameters, and Cloudflare edge latency ping.

[Security

☆](https://denizlihub.com/password-generator/)

Strong Password Generator

Generate cryptographically random passwords with symbols, numbers, and entropy strength score.

[Text

☆](https://denizlihub.com/text-stats/)

Word & Character Counter Studio

Count words, characters, estimated reading/speaking times, and convert text case (UPPER, lower, Title, Slug).

[Calculate

☆](https://denizlihub.com/unit-converter/)

Unit Converter (PX/REM, Storage, Temp)

Convert CSS Pixels (px) to REM, digital data storage (Bytes, KB, MB, GB, TB), and temperature units.

[Time

☆](https://denizlihub.com/unix-timestamp/)

Unix Timestamp & Epoch Converter

Convert Epoch timestamps to human-readable dates and parse datetime strings into Unix timestamps.

[Text

☆](https://denizlihub.com/lorem-generator/)

Lorem Ipsum Dummy Text Generator

Generate placeholder Lorem Ipsum filler text with custom paragraph, word, or sentence counts.

[🔥 New Studio

☆](https://denizlihub.com/voice-recorder/)

Online Voice Recorder & Audio Studio

Record high-fidelity voice memos directly from your microphone with live oscillating waveform and 1-click WAV / MP3 export.

[🔥 Finance & Tax

☆](https://denizlihub.com/kdv-calculator/)

Turkish VAT, Tax & Invoice Calculator

Calculate Turkish VAT (KDV), withholding tax (Stopaj), VAT tevkifat fractions (5/10, 7/10), and freelance SMM gross-to-net invoices.

source & further reading
denizlihub.com — original article
── more in #ai-tools 4 stories · sorted by recency
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