File Conversion APIs for Developers
Production-ready REST APIs covering 23 product surfaces across video, audio, image, document, ebook, archive, font, and utility operations. Single uniform endpoint, 9 language SDKs, async webhook callbacks, cloud-to-cloud workflows, and a free tier you can integrate without signing up.
Why developers ship on the ConvertIntoMP4 API
270+ formats, 2,290+ honest pairs
Largest accurate-output conversion surface on the market — every advertised pair has a real engine behind it.
9 language SDKs, single contract
Node, Python, PHP, Java, Go, Ruby, C#, Kotlin, Swift. All in-tree with the backend so they ship in lock-step.
Cheaper than the alternatives
Pro $9.99/mo, Business $24.99/mo. FreeConvert charges $12.99/$29.99 for parity specs — we undercut at every tier.
2× faster median latency
Typical conversions complete in 6-9 seconds end-to-end vs 10-15s on FreeConvert.
Cloud-to-cloud workflows
Pull from S3, GCS, Azure Blob, or signed URLs. Push to S3, GCS, Azure, SFTP, Google Drive. Bytes never round-trip through your servers.
Free tier, no signup
5 conversions/day with 100 MB file limit. IP-gated. Perfect for prototyping before committing to a plan.
All 23 API products
Tap any card for the full reference — supported formats, code samples in curl, Node, and Python, plus the FAQ specific to that surface.
Unified API surfaces
File Conversion API
One unified file conversion API for video, audio, image, document, ebook, archive, and font formats — 255 formats, 2,290+ conversion pairs.
Convert API
Production-grade file conversion API with 9 language SDKs, async webhooks, and cloud-to-cloud workflows. Free tier available.
Media Conversion API
Video and audio conversion API in one endpoint. 27 video + 21 audio formats, FFmpeg-backed, GPU-accelerated.
Video & Streaming
Image & Photography
Documents & Office
Ebooks & Publishing
Archives & Compression
Fonts & Typography
High-demand conversion pairs
MP4 to MP3 API
Extract MP3 audio from MP4 video programmatically. Per-job bitrate and sample rate, ID3 tag injection, fast remux mode.
PDF to JPG API
Render PDF pages to JPG images programmatically. Per-page DPI, page-range selection, batch ZIP output, ImageMagick + pdftoppm pipeline.
JPG to PNG API
Convert JPG to PNG with optional transparency, lossless compression, and EXIF preservation via API. Sharp-backed.
MP4 to GIF API
Convert MP4 video to animated GIF programmatically. Per-job width, fps, palette mode, and start/end trim controls.
PDF to DOCX API
Convert PDF to editable Word DOCX via API. Preserves layout, fonts, tables, and images. pdf2docx + OCR fallback.
DOCX to PDF API
Convert Word DOCX to PDF programmatically. LibreOffice-rendered with font fallback, headers/footers, and PDF/A archival output.
HEIC to JPG API
Convert iPhone HEIC and HEIF photos to JPG via API. EXIF rotation, ICC profile, Live Photo frame selection.
WebM to MP4 API
Convert WebM (VP8/VP9/AV1) to MP4 (H.264/H.265) via API. Re-encode or copy-codec remux mode, full FFmpeg control.
Utility operations
Compression API
Compress video, image, PDF, and audio files programmatically. Per-file-type presets and target-size mode.
Merge API
Merge PDFs, videos, images, and audio files programmatically. Order-preserving, format-aware concatenation.
Split API
Split PDFs by page range, videos by duration, audio by silence detection via API. Per-output naming and ZIP delivery.
OCR API
Optical Character Recognition for PDFs and images via API. 100+ languages, searchable PDF output, plain-text extraction.
Watermark API
Add text or image watermarks to PDFs, videos, and images via API. Configurable position, opacity, rotation, and tiling.
Pricing
Free
$0
5 conversions/day, 100 MB limit, IP-gated. No signup or key required.
Pro
$9.99/mo
100 conversions/day (2,000/month), 2 GB files, 60 req/min, priority queue.
Business
$24.99/mo
1,000 conversions/day (20,000/month), 10 GB files, 300 req/min, GPU encoding, dedicated support.
See the full breakdown on the pricing page — pay-as-you-go API plan also available.
Start integrating in 5 minutes
Read the API docs, grab an API key, or run a request against the live sandbox without consuming credits. The Free tier works without signup — useful for prototyping.
About the ConvertIntoMP4 API
Every endpoint shares the same authentication, idempotency, and webhook contract, so once you integrate one of the 23 product surfaces above you can switch between them with a parameter change. The platform runs on the same backend that powers the public converter — same engines, same SLA, same Cloudflare R2 storage with auto-deletion.
The catalog covers seven category APIs (video, audio, image, document, ebook, archive, font), eight high-demand pair APIs (MP4 to MP3, PDF to JPG, JPG to PNG, MP4 to GIF, PDF to DOCX, DOCX to PDF, HEIC to JPG, WebM to MP4), five utility APIs (compression, merge, split, OCR, watermark), and three generic unified surfaces (File Conversion, Convert, Media Conversion) for callers that prefer one endpoint across all file types.
Honest-output gating means we don't ship pages or endpoints for pairs the platform can't truthfully produce. Every advertised conversion has a real engine and a real output — see the homepage for the full live catalogue.