Free Online Tools You Can Use Right Now (Text, Dev, Image, Security, Conversion)

Need a quick, trustworthy utility? This curated list covers every free online tool currently available on ToolsAreUs. No accounts, no tracking bloat, just fast client‑side functionality. Bookmark this page as your Swiss‑army collection for everyday developer productivity, content creation, data formatting, security hashing, and random generation.

Why these free tools?

• Private: Most logic runs in your browser (client-side processing).
• Fast: Lightweight pages with no giant frameworks at runtime.
• No signup: Use immediately; no accounts or emails.
• Focused: Each tool solves one problem clearly.
• Accessible: Works on desktop and mobile.

Tool categories

Browse the full alphabetical index below or use the site sidebar search. Popular categories include text utilities, cryptography helpers, encoders/decoders, randomness generators, color & image tools, and data / file format converters.

All available tools (A–Z)

Currently 41 tools live. We keep adding more — check back or suggest one via Contact.

• Base Converter – Convert numbers between bases.
• Base32 Encode / Decode – Convert text to/from Base32.
• Base64 Encode / Decode – Convert text to/from Base64.
• BMI Calculator – Body Mass Index metric/imperial.
• Case Converter – Lower, UPPER, Title, snake, kebab.
• Character Frequency – Count character occurrences.
• Color Contrast Checker – WCAG contrast ratio & scores.
• Color Converter – Convert HEX/RGB/HSL.
• CSV → JSON – Convert simple CSV to JSON.
• CSV Diff / Merge – Line-based CSV diff & union merge.
• EXIF Viewer – Extract limited EXIF metadata.
• GUID v1 / v7 Generator – Generate Version 1 and 7 UUIDs.
• HMAC SHA-256 – Compute HMAC SHA-256 hash.
• HTML Escape / Unescape – Convert < & > to entities.
• Image Converter – Convert PNG/JPEG/WebP locally.
• JSON ⇄ Base64 – Encode/decode JSON with Base64.
• JSON Formatter & Validator – Format/minify and validate JSON.
• JWT Decoder – Decode JWT header/payload.
• Line Deduplicator – Remove duplicate lines.
• Line Sorter – Sort lines (asc/desc, unique).
• Lorem Ipsum Generator – Generate placeholder text locally.
• Markdown Preview – Lightweight markdown to HTML.
• Password Generator – Generate random passwords.
• Password-protected ZIP – Encrypt any file into an AES-256 ZIP locally.
• QR Code Generator (v1-L) – Generate a simple QR (version 1-L).
• Random Color Palette – Generate random palette.
• Random Number Generator – Secure random integers.
• Regex Tester – Test JavaScript regex.
• Roman Numerals – Convert to/from Roman numerals.
• SHA-256 Hash – Compute SHA-256 hashes.
• Slug Generator – Generate URL-friendly slugs.
• String Length & Bytes – Count chars & UTF-8 bytes.
• Text Diff – Compare two text blocks.
• Text Reverser – Reverse entire text or per-line.
• Timestamp Converter – UNIX ↔ ISO ↔ Local.
• URL Encoder / Decoder – Encode/decode URL components.
• URL Parser – Break URL into components.
• UUID Generator – Generate v4 UUIDs locally.
• Word Counter – Count words, characters, and lines.
• XOR Calculator – XOR two equal-length hex values.
• YAML ⇄ JSON – Convert between YAML (subset) & JSON.

Highlighted use cases

• Security & Hashing: Generate SHA‑256 or HMAC SHA‑256 digests for integrity checks.
• Data Conversion: Convert CSV ⇄ JSON, YAML ⇄ JSON, Base64 ⇄ text, or transform number bases.
• Text Cleanup: Sort, dedupe, format, reverse, count words / characters, escape HTML, or generate lorem ipsum.
• Content & Dev: Preview Markdown, test regex patterns, generate UUIDs, slugs, GUIDs, passwords or random numbers.
• Visual & Media: Convert images, check color contrast, generate color palettes, extract EXIF metadata, or build QR codes.

SEO-friendly search phrases we target

We intentionally support queries like: “free base64 encoder”, “quick csv to json converter”, “online sha256 generator”, “hmac tool”, “text diff online”, “uuid generator”, “random number tool”, “color contrast checker WCAG”, “markdown preview online”, and “qr code maker”. Each dedicated tool page includes focused semantic content to help answer those intents.

What’s next

Upcoming planned additions: image optimization, JSON schema validator, JWT signer (offline), and batch find/replace playground. Have an idea? Use the Contact link in the sidebar. Want stronger passwords? Read our secure password generation guide.

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