L0ss

L0ss is a privacy-first file compression service specializing in lossy compression across 11 file formats. Unlike traditional tools that focus on a single format, L0ss provides a unified solution for developers working with multiple file types.

Supported Formats & Compression:

• JSON (58%) - Frequency-based key compression, null removal, duplicate deduplication
• JavaScript (68%) - Comment removal, console.log stripping, whitespace optimization
• SQL (70%) - Alias shortening, keyword removal, INSERT combining, schema stripping
• SVG (79%) - SVGO-based path optimization, attribute cleanup, empty element removal
• HTML (45%) - tdewolff/minify techniques: DOCTYPE normalization, attribute optimization
• CSS (48%) - CSSO-inspired: property merging, selector deduplication, zero unit removal
• CSV (30-50%) - Delta encoding, dictionary encoding, column removal, numeric rounding
• XML/YAML (10-35%) - Tag shortening, attribute optimization, whitespace removal
• Markdown (10-25%) - Link simplification, comment removal, header cleanup
• Text (5-15%) - Whitespace normalization, duplicate line removal

Key Features:

Preview Before Compressing: Upload files to see side-by-side comparisons of all three levels. View exact byte counts, reduction percentages, and detailed diffs before committing.

Configurable Options: Customize compression per file type - enable/disable specific optimizations like delta encoding, dictionary encoding, comment removal, or console.log stripping.

Recovery Manifests: Download JSON manifests showing exactly what operations were performed, reversibility status, and file integrity hashes.

Privacy-First:

• No accounts or tracking
• 24-hour auto-deletion
• AES-256 encrypted storage (Cloudflare R2)
• GDPR/CCPA compliant

REST API:

• POST /api/compress - Single file compression
• POST /api/compress/batch - Up to 10 files at once
• POST /api/analyze - Preview without storing
• GET /api/download/:fileId - Download compressed files
• GET /api/manifest/:manifestId - Download recovery manifests

Batch Operations: Compress multiple files in one request with aggregate statistics (total processed, average reduction, success/failure counts).

Live Benchmarks (Verifiable):

• JavaScript: 6,169 ? 2,291 bytes (62.86%)
• JSON: 4,700 ? 1,974 bytes (58%)
• CSV: 1,130 ? 597 bytes (47.17%)

Technical Foundation: Built using proven techniques from SVGO, tdewolff/minify, CSSO, Gorilla (delta encoding), and BtrBlocks (dictionary encoding). Full attribution in documentation.

Use Cases: Development (reduce bundle sizes), testing (lightweight fixtures), data transfer (compress API payloads), storage (minimize costs), documentation compression.

Limits: 10 requests/hour per IP, 10MB max per file, up to 10 files per batch. No authentication required.

Built on Cloudflare Workers for global edge deployment with sub-100ms response times. Try now at https://l0ss.com - no signup required.