Free developer tools
Small, single-purpose utilities that run entirely in your browser — no sign-up, nothing uploaded. Open the full suite →
🔁 Base64 ↔ Image
Convert images to Base64 and back. Byte-validated in both directions.
🗜️ Image Compressor
Shrink image file size locally with adjustable quality.
🔄 Image Converter
Convert between PNG, JPEG, WebP, and more.
🧩 SVG Viewer
Preview, inspect, and clean up SVG markup safely.
▶️ Lottie Viewer
Preview .lottie and Lottie JSON animations.
📐 dp ↔ px
Convert Android density-independent pixels to screen pixels.
🔤 sp ↔ px
Convert Android scale-independent pixels for text sizing.
🎨 Android Colors
Build and preview an Android colors.xml resource file.
✏️ Vector Drawable
Convert SVG to Android VectorDrawable XML.
🧰 ADB Generator
Build common adb shell commands from simple inputs.
📄 Manifest Viewer
Inspect and format an AndroidManifest.xml file.
{ } JSON
Format, minify, and validate JSON.
</> XML
Format and validate XML documents.
🗄️ SQL
Format and beautify SQL queries.
🔎 Regex
Test regular expressions with live match highlighting.
📝 Markdown
Live-preview Markdown side by side with the source.
↔️ Diff
Compare two blocks of text and highlight differences.
🔗 URL Parser
Break a URL into protocol, host, path, and query.
🪪 JWT
Decode a JWT's header and payload locally.
🚦 HTTP Status
Searchable reference for HTTP status codes.
⌨️ cURL Generator
Build a cURL command from method, headers, and body.
📡 API Tester
Send quick requests and inspect responses.
🔢 Token Counter
Estimate token counts for LLM prompts.
🧱 Prompt Builder
Assemble reusable prompt templates.
📋 JSON Schema
Generate or validate a JSON Schema from example data.
🧾 Structured Output
Design tool-call/structured output schemas.
🧪 API Playground
Build LLM API requests and generate code.
64 Base64
Encode text to Base64 or decode back to text.
% URL Encode
Percent-encode or decode text and URIs.
# Hash
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes.
⬡ UUID
Generate v4 UUIDs in bulk.
▦ QR / Barcode
Generate QR codes and 1D barcodes.
🕐 Timestamp
Convert Unix timestamps to readable dates.
🌍 Timezone
Convert and compare a time across timezones.
📅 Cron
Build and explain cron expressions.
🗒️ Notes
A quick local scratchpad.
✂️ Snippets
Save and organize reusable code snippets.
✅ TODO
A minimal local task list.
📋 Clipboard
A short local history of copied text.
📒 Einnahmen-Ausgaben-Rechnung
Track income/expenses for Austrian side income.
💰 Netto / Brutto
Convert gross/net salary for Austria.
⏱️ Work Hours Calculator
Track shifts, breaks, and estimated earnings.
🧾 Invoice Generator
Austria/EU-compliant invoices with VAT breakdown.
⛽ Mileage / Fuel Calculator
Fuel needed and trip cost from consumption.