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Online Tools for Developers

A fast, practical collection of developer tools — hashing, encoding, JSON formatting, and much more. Everything runs right in your browser, with no installation and without sending your data anywhere.

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Why ACY Tools?

Built for speed, privacy, and simplicity.

Runs in Your Browser

Every tool processes directly on your device. No data is sent to or stored on our servers.

Fast & Lightweight

No heavy loading, no server queues. Instant results as you type.

Free Forever

No sign-up required, no usage limits. Open it and start using it.

Privacy-friendly

Because everything is processed on your side, your sensitive data stays safe and private.

Browse by Category

Pick a category to find the tool you need.

Hash

63 tools

Compute hash values from text — MD5 and the SHA family (SHA-1, SHA-224, SHA-256, SHA-384, SHA-512) — for checksums and data integrity verification, right in your browser.

View all in Hash

Encoding

49 tools

Encode & decode text: Base64 & the Base family, URL, HTML/XML, Hex/Binary, Unicode, Morse, classic ciphers, and much more — all in your browser.

View all in Encoding

Cryptography

45 tools

Encrypt & decrypt (AES, ChaCha20, RSA), digital signatures, JWT/JWS/JWE, key generation & conversion, key derivation & exchange, OTP (TOTP/HOTP), certificates, and secure random generators — all in your browser.

View all in Cryptography

Formatter

24 tools

Beautify & minify code: JSON, XML, HTML, CSS, JavaScript, TypeScript, SQL, YAML, Markdown, and much more — all in your browser.

View all in Formatter

Data

46 tools

Convert, validate, query, and transform data: JSON, YAML, TOML, XML, CSV, MessagePack, CBOR, Parquet, plus SQLite (WASM) — all in your browser.

View all in Data

Text

91 tools

Work with text: change case, sort & dedupe lines, find & replace (regex), statistics, fancy text, Unicode cleanup, and much more — all in your browser.

View all in Text

Extractor

46 tools

Pull data from text, HTML, Markdown, SVG, and files: emails, URLs, IPs, photo EXIF, PDF text, image OCR, DOCX text, color palettes — all in your browser.

View all in Extractor

Generator

54 tools

Create new data from scratch: UUID, passwords, tokens, QR codes, barcodes, favicons, avatars, mock JSON, SQL data, fake data, SVG, regex, cron, timestamps, and much more — all in your browser.

View all in Generator

Color

52 tools

Work with color: convert (HEX/RGB/HSL/OKLCH/LAB), color picker, palettes & gradients, color harmonies, WCAG contrast, color-blindness simulation, mix/tint/shade, and export to CSS/SCSS/Tailwind — all in your browser.

View all in Color

Obfuscator

4 tools

Obfuscate & deobfuscate code to protect it from copying and reverse-engineering: JavaScript, TypeScript, HTML, and CSS — with control flow flattening, dead code, string array, and more — all in your browser.

View all in Obfuscator

Calculator

125 tools

Calculators for developers: programmer/bitwise/base/IEEE-754, BigInt & high precision, subnetting (CIDR/IPv4/IPv6), units & storage, date & time, math, CSS/typography, media, and finance — all in your browser.

View all in Calculator

HTTP

68 tools

HTTP developer tools: convert cURL to 9 languages, header builders/parsers, cookies, auth, bodies, status codes, cache, CSP & security headers, CORS, compression (gzip/deflate), plus OpenAPI/Postman/HAR viewers — all in your browser.

View all in HTTP

Compare two inputs and see the differences visually: text, JSON, YAML, XML, CSV, code, URLs, HTTP headers, cookies, JWTs, config files, and much more — with side-by-side/unified views, a change summary, and a similarity percentage, all in your browser.

View all in Diff & Compare

Parser

49 tools

Break raw input into structured components: URLs, query strings, cron, SemVer, MAC, MIME, JSON Pointer/Path, INI/.env/CSV, ASTs (JS/TS/SQL/CSS/regex/HTML DOM), XML/Markdown/RSS, sitemap/robots/ads.txt, Dockerfile/nginx, User-Agent, logs, email headers, and dates — all in your browser.

View all in Parser

Validator

51 tools

Check whether input is valid and find what's wrong: UUID, ULID, IP/CIDR/MAC, domain, URL, email, credit card, IBAN, ISBN, color, dates, cron, Base64, SemVer, hashes (MD5/SHA/bcrypt), JWT, PEM, plus JavaScript/TypeScript/SQL/CSS/regex syntax — all in your browser.

View all in Validator

Viewer

41 tools

Open & view files and text as-is, right in your browser: PDF, Word, Excel, images, SVG, audio, video, fonts, ZIP/TAR, hex/binary, EXIF, QR/barcode reader, plus Markdown/HTML preview, CSV tables, XML trees, and syntax-highlighted code — read-only, no upload.

View all in Viewer

Analyzer

24 tools

Analyze input and get an insight report — metrics, statistics, warnings, and recommendations: JSON/CSV/XML/YAML, HTML/DOM/CSS, JavaScript/TypeScript/SQL/regex, URLs, cron, package.json/tsconfig/Dockerfile, CSP, and access logs — all in your browser.

View all in Analyzer

Web

50 tools

Generate ready-to-use web files & markup: meta tags, Open Graph & Twitter Cards, JSON-LD/Schema.org, robots.txt, sitemap.xml, PWA manifest, ads.txt, security.txt, RSS/Atom feeds, plus social share & SERP previews — all in your browser.

View all in Web

Development

24 tools

Generate ready-to-commit config & deployment files: ESLint/Prettier/Babel/Vite/Webpack/Rollup, Dockerfile/Docker Compose, Nginx/Apache, GitHub Actions/GitLab CI/Jenkins, PM2/systemd, .env/.gitignore/README/LICENSE/CHANGELOG — all in your browser.

View all in Development
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