DevDock
43toolsPrivate developer utilities that run in your browser — no signup, no uploads, no waiting.
Client-side · Fast · Free
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Text
6JSON Formatter
Format, minify, validate, and explore JSON with Text and Tree views.
Word Counter
Live words, characters, reading time, keyword density, and platform limits.
Text Diff
Compare two texts with line and word highlights — side-by-side or inline.
Case Converter
Live grid of camelCase, snake_case, kebab-case, Title Case, and more — copy any style.
Markdown Preview
Live Markdown editor with GFM preview — copy Markdown or sanitized HTML.
Slug Generator
Turn titles into clean URL slugs — lowercase, hyphenated, SEO-friendly.
Encode / Decode
5JWT Decoder
Decode and inspect JSON Web Tokens client-side.
Base64 Encode / Decode
Encode or decode Base64 — UTF-8 safe, standard or URL-safe, optional file encode.
URL Encoder / Decoder
Percent-encode and decode URLs and query strings.
Hash Generator
MD5, SHA-1, SHA-256, SHA-512 from text or a file — client-side checksums.
HTML Encoder / Decoder
Encode or decode HTML entities safely in your browser.
Images & QR
4QR Code Generator
Create print-ready QR codes for links, Wi‑Fi, and text — PNG & SVG, no short links.
Image Compressor
Compress and resize JPG, PNG, or WebP in your browser — quality, max size, no upload.
Image Converter
Convert images between PNG, JPEG, and WebP in your browser — nothing uploaded.
Favicon Generator
Make favicons from text, emoji, or an image — PNG/ICO sizes ready to download.
Everyday
8Unit Converter
Convert length, weight, temperature, volume, area, and speed — metric ↔ imperial.
Time Zone Converter
Convert any date and time across cities — DST-aware IANA zones for meetings.
Percentage Calculator
Percent of, percent change, discounts, and sales tax — fast everyday math.
Sales Tax Calculator
Add sales tax to a price or back out tax from an inclusive total — private, client-side.
Discount Calculator
Price after a percent off — and how much you save. Fast, private, no upload.
UTM Link Builder
Build clean GA4 campaign URLs with utm_source, utm_medium, utm_campaign, and more.
LLM Token Calculator
Exact OpenAI tiktoken counts + cost estimates — GPT-4o, GPT-5, o-series, embeddings.
Number Base Converter
Binary, octal, decimal, hex, and base 2–36 — live linked fields, BigInt-exact.
Developer
14Regex Tester
Test JavaScript regex live — matches, groups, replace, and copy-ready literals.
Cron Explainer
Explain Unix cron expressions — plain English, field decode, next runs in any timezone.
YAML ↔ JSON
Convert YAML ↔ JSON with multi-doc streams, anchors, and merge keys — private, client-side.
Unix Timestamp Converter
Convert Unix epoch ↔ dates — auto seconds/ms, ISO, UTC, local, relative.
CSV ↔ JSON
Convert CSV ↔ JSON with headers, delimiters, quoting, and type coercion.
SQL Formatter
Pretty-print or minify SQL — PostgreSQL, MySQL, SQLite, BigQuery, T-SQL.
MySQL Formatter
Pretty-print or minify MySQL queries in your browser — keyword case, indent, private.
PostgreSQL Formatter
Pretty-print or minify PostgreSQL / Postgres SQL — CTEs, windows, private.
SVG to Tailwind / CSS
Clean SVG and export Tailwind JSX, CSS masks, or plain SVG with live preview.
SVG to JSX
Convert SVG markup to React JSX — clean attributes, live preview, copy ready.
SVG to Tailwind
Turn SVG into Tailwind-ready JSX with size classes and currentColor.
HTML to JSX
Convert HTML to React JSX — className, camelCase attrs, copy-ready.
Chmod Calculator
Toggle Unix rwx — get octal, ls style, symbolic mode, and a chmod command.
Subnet Calculator
IPv4 CIDR math — network, broadcast, usable hosts, netmask, wildcard.
Color
2Generators
4JSON / Mock Data Generator
Generate realistic mock JSON for APIs and UI — users, products, custom shapes.
Password Generator
Generate strong random passwords with length, charset, and bulk options.
UUID Generator
Create UUID v4 and v7 IDs in bulk — secure and private.
Lorem Ipsum Generator
Generate classic or random filler as plain text, HTML, Markdown, or lists.