Files & Media calculators
Image, PDF, audio, video. Crop, resize, compress, convert - all in your browser using the Canvas / WebCodecs APIs. Files never leave your device.
All files & media tools
51 tools, each runs locally in your browser. Click any card to open it.
AI Image to Prompt takes string, regex, format, count and returns the matching ai image to prompt result. Runs entirel…
MP3 320 kbps ~ CD quality. FLAC lossless ~1000 kbps.
Concatenate multiple audio clips.
Speed up or slow down. (Pitch shifts with speed.)
Trim an audio file by start and end seconds.
Background Remover computes estimated BAC, time to sober from drinks consumed, weight, sex, hours since first drink. R…
Boost an audio file is volume.
Depth of Field Calculator is a free photo & video calculator that gives you a deterministic answer for depth of field …
Strip EXIF, GPS, camera, and embedded metadata from JPG / PNG / WebP - re-encode in your browser.
Pick pages to extract into a new PDF.
Frame Rate / Frame Time is a free photo & video calculator that gives you a deterministic answer for frame rate / fram…
Blur an image. Adjustable radius.
Compress JPG / PNG / WebP entirely in your browser. Adjustable quality, optional resize. No upload to any server.
✂️ Crop image. Drag to select or enter exact coordinates.
Crop any image to a preset aspect ratio (1:1, 4:5, 16:9, etc.) with center or edge alignment.
Flip horizontally or vertically.
Resize an image to any dimension. Maintain ratio or stretch.
Resize images by exact pixel dimensions. Lock aspect ratio. Output as JPEG, PNG, or WebP.
Rotate by any angle. Browser-only, instant.
Image to Base64 takes string, regex, format, count and returns the matching image to base64 result. Runs entirely in y…
A Image to Text (OCR) converts Image into Text (OCR) directly in your browser. It parses the source format, applies th…
Bicubic upscale 2× / 3× / 4×. Best for line art and small images.
Add a text watermark. Choose position, opacity, color.
Stitch multiple images together. Horizontal, vertical, or grid.
Resize any image to 1200 x 630 (Open Graph / Twitter Card) - cover or contain modes.
Compress a PDF. Re-stream metadata or rasterize for size.
Combine PDFs into one document.
Adding a password to a PDF locks the document so it can only be opened (or modified, depending on permissions) by some…
Scanned documents, photographed receipts, and converted slides often end up sideways or upside down in PDF form.
Split a PDF. Each page → separate file, or extract specific ranges.
A PDF to Image Converter converts PDF into Image directly in your browser. It parses the source format, applies the st…
PDF to Word Converter takes source value and source unit and returns the matching pdf to word result. Runs entirely in…
Open a permission-restricted PDF and save without restrictions.
Stamp every page with a text watermark.
Photography Exposure Calculator is a free photo & video calculator that gives you a deterministic answer for photograp…
QR Code Capacity Calculator takes string, regex, format, count and returns the matching qr code capacity result. Runs …
QR Code Generator takes string, regex, format, count and returns the matching qr code generator result. Runs entirely …
Remove Background computes estimated BAC, time to sober from drinks consumed, weight, sex, hours since first drink. Ru…
A Resize Image to 100 KB converts Resize Image into 100 KB directly in your browser. It parses the source format, appl…
A Resize Image to 20 KB converts Resize Image into 20 KB directly in your browser. It parses the source format, applie…
A Resize Image to 200 KB converts Resize Image into 200 KB directly in your browser. It parses the source format, appl…
A Resize Image to 50 KB converts Resize Image into 50 KB directly in your browser. It parses the source format, applie…
RSU vs ISO Comparison takes filing status, wages, deductions, credits and returns the matching rsu vs iso comparison r…
UPI QR Code Generator takes string, regex, format, count and returns the matching upi qr code generator result. Runs e…
Cropping video changes the frame area shown - removing the edges of each frame to a smaller rectangle. The most common…
Bitrate × duration = file size. 4K HDR ~25-50 MB/min, 1080p ~10-20.
Flip a video horizontally or vertically.
Combine multiple video clips into one.
Resize a video to any width / height.
Phone videos shot in portrait sometimes save with the wrong rotation flag - they look upright in Photos.app but land s…
Trim a video by start and end seconds.
About files & media
Files and media tools cover the image, audio, video, and PDF operations you'd otherwise upload to a server: image crop/resize/rotate/flip/compress/convert (PNG, JPEG, WebP, AVIF), PDF merge/split/compress/rotate/password, audio trim/merge/MP3-encode/speed/boost-volume, video crop/trim/merge/convert-to-MP4 with H.264 + AAC, QR-code generator, EXIF metadata viewer and remover, background remover, and file integrity timestamp (SHA-256).
Use these to crop a profile photo for LinkedIn (1:1), compress a 12 MB PDF to under 5 MB for an email attachment, remove EXIF GPS from photos before posting, trim the first 30 seconds off a podcast intro, convert MOV to MP4 for a Windows colleague, or generate a 1 KB QR code for a meeting URL. Everything runs in your browser using Canvas, Web Audio, WebAssembly (ffmpeg.wasm), and Web Crypto.
Sources: HTML Canvas spec for image ops, ffmpeg.wasm for audio/video, pdf-lib for PDF, qr-code-styling for QR. No uploads; the file you drop is read into memory, processed by JavaScript, and offered back as a download.
Common use cases
Real scenarios where the files & media calculators in this category earn their keep.
Compress a PDF for email
Re-encode images inside the PDF at lower quality, drop fonts not used in the body. Typical 40-70% size reduction with minimal visible quality loss.
Remove EXIF GPS from a photo
Strip the EXIF block (camera, GPS, timestamp) so a photo shared online doesn't leak location. The EXIF tool removes selectively or wholesale.
Convert MOV to MP4
ffmpeg.wasm re-muxes H.264 video + AAC audio into an MP4 container without re-encoding when the source codec is already compatible.
Merge multiple PDFs
Drop in 2-50 PDFs in any order, drag to reorder, click merge. Pages preserved, bookmarks merged into the new TOC.
Background remover
Foreground subject extraction using a small in-browser model (no upload). Output transparent PNG. Works well on portraits and product shots.
Key terms
Glossary for the formulas and conventions these tools use.
- EXIF
- Exchangeable Image File Format. Metadata block in JPEG and TIFF files. Contains camera settings, timestamp, and sometimes GPS coordinates.
- Container vs codec
- MP4, MOV, MKV, WebM are containers. H.264, HEVC, VP9, AV1 are video codecs. AAC, MP3, Opus are audio codecs. A container holds one or more codec streams.
- Lossy vs lossless
- JPEG, MP3, H.264 throw information away to shrink files. PNG, FLAC, ProRes preserve every bit. Lossy is fine for delivery; lossless for archival and editing.
- Bitrate
- Bits per second. Higher = bigger file + better quality. H.264 1080p at 8 Mbps is high quality; 2 Mbps is web-streaming acceptable.
- Sample rate
- Audio samples per second. CD is 44.1 kHz, broadcast 48 kHz, hi-res 96 or 192 kHz. Higher captures more audio frequencies.
- ffmpeg.wasm
- FFmpeg compiled to WebAssembly so it runs in the browser. Powers the audio and video tools without server uploads.
- SHA-256 timestamp
- Cryptographic fingerprint of a file. Used as proof-of-existence; combine with a timestamp to prove a file existed at a given moment.
Frequently asked questions
Short answers to the most common files & media questions.