🧰 Online Tools Directory

🌐 VirusTotal ☆

Google's multi-engine online scanner: one submission checks files, URLs, domains and IPs against 70+ antivirus engines. Web scanning needs no account.

💼 Excalidraw ☆

Open-source hand-drawn style online whiteboard for sketches, brainstorming and teaching. Local drawing and share links are free; cloud workspaces are paid.

💼 draw.io (diagrams.net) ☆

Open-source free online diagramming tool for flowcharts, UML, architecture and ER diagrams. Save locally or to Google Drive/GitHub — no sign-up.

📄 iLovePDF ☆

Online PDF toolbox with dozens of tools: merge, split, compress, convert, watermark and more. The free tier has task and size limits, no sign-up needed.

🎨 Figma ☆

Browser-based UI design and collaboration tool. The free Starter plan allows 3 design files, 3 FigJam and 3 Slides files, with unlimited drafts.

🎨 Canva ☆

Online design platform with massive template library and drag-and-drop editing for posters, slides and video. Generous free tier; premium assets need a subscription.

🎨 TinyPNG ☆

Veteran online image compressor using smart lossy compression. Free tier: up to 20 images per batch, 5MB each, no sign-up.

🎨 Photopea ☆

Free online image editor with a Photoshop-like interface, supporting PSD, Sketch and XD formats — no install, no sign-up (ad-supported).

✨ remove.bg ☆

Online AI background remover. Free tier downloads standard-resolution results; higher resolutions require paid credits.

✨ Google Translate ☆

Google's free online translator supporting 130+ languages for text, web pages, documents and images — no account required.

🌐 Wolfram Alpha ☆

Computational knowledge engine that answers math, unit conversions and data queries with step-by-step results. Free web use is limited; Pro unlocks more.

🌐 Cloudflare Speed Test ☆

Cloudflare's official free speed test measuring download, upload, latency, jitter and packet loss across its global edge network, with streaming/gaming/video-call scores — no sign-up.

🛠️ CodeSandbox ☆

Veteran online code sandbox for creating, running and sharing full-stack projects in the browser. Free tier for public sandboxes; advanced features need a subscription.

🛠️ StackBlitz ☆

In-browser IDE that boots Node and front-end projects in seconds with Vue/React/Angular templates. Opening and editing need no login; saving projects needs a GitHub account.

🛠️ Carbon ☆

Open-source tool that turns pasted code into beautiful images with syntax highlighting and themes, exportable as PNG/SVG — no sign-up.

🛠️ crontab.guru ☆

Online cron expression editor that explains each field in plain language as you type and shows the next run times. Completely free.

🛠️ regex101 ☆

Online regex tester with live match highlighting and step-by-step explanation, supporting PCRE/Python/JavaScript/Go flavors. Usable free tier.

🛠️ Base64 Decode ☆

Online Base64 encoder/decoder for text and files up to 100MB, with charset selection, line-by-line decoding and live mode. Chinese UI available.

🛠️ JSON Hero ☆

Open-source JSON viewer with column, tree and editor views. Auto-detects images, dates and colors for preview, and generates share links.

🛠️ JSON Crack ☆

Online tool that renders JSON as a node graph. Paste, upload or import by URL, export as image — core features free.

💼 ProcessOn ☆

Chinese online diagramming tool for mind maps, flowcharts, UML and Gantt charts. Free plan: 9 files with unlimited nodes; sign-up required.

📄 Diffchecker ☆

Online diff tool supporting text, image, PDF, Excel and folder comparison with highlighted differences. Usable free tier.

📄 Convertio ☆

Lightweight online format converter supporting 300+ formats. Free tier: 100MB per file with daily limits, no sign-up.

📄 CloudConvert ☆

Online file conversion across 200+ audio, video, document and image formats. The free tier allows a daily number of conversion minutes.

📄 PDF24 Tools ☆

Completely free online PDF toolbox covering compression, merging, conversion and editing — no sign-up, with desktop and mobile apps.

📄 Smallpdf ☆

Online PDF toolset. The free tier handles 2 files per day across compression, conversion, merging, signing and more, with a clean interface.

🎨 QRCode Monkey ☆

Free QR code generator. Static codes are free forever with unlimited scans, custom colors, logos and vector export (SVG/EPS/PDF) — no sign-up.

🎨 TinEye ☆

Veteran reverse image search engine. Upload an image to find where it appears online, sortable by size, modification and date. Free for personal, non-commercial use.

🎨 Squoosh ☆

Google's online image compressor that runs entirely in your browser — images never leave your device. Multiple codecs with live comparison.

✨ PicWish ☆

Chinese online AI image toolkit: one-click cutout, ID photo background swap, watermark removal, deblurring and lossless upscaling, fully in Chinese.

✨ Bigjpg ☆

AI image upscaler based on deep convolutional neural networks, up to 16x. Guests can use the web version directly; login or paid plans add quota and speed.

✨ OnlineOCR ☆

Free online OCR supporting 46 languages including Simplified Chinese; guest mode converts 15 files per hour with no sign-up.