10 browser-local utilities
Make the
numbers match
the cut.
Frame-accurate calculators and private file helpers for editorial, framing, storage, captions, and delivery.
Files stay localNo accountFree to use
The toolbox
From ingest to delivery
Single-purpose tools with explicit assumptions. Nothing uploads; supported files and calculations stay on this device.
01Bitrate & sizeCalculate estimated video file size from duration and bitrates, or find the bitrate available for a target file size.Storage02TimecodeConvert SMPTE timecode to absolute frame count and elapsed time, including 29.97 and 59.94 drop-frame timecode.Editorial03Frames & durationConvert a video duration to a frame count or frames back to duration at common and custom frame rates.Editorial04Aspect & resolutionReduce a raster to its exact aspect ratio and calculate a matching width or height for a target frame.Framing05Crop & letterboxCalculate fit, fill, crop, and letterbox geometry between a source raster and target canvas.Framing06Frame-rate conformCalculate the new duration and speed change when existing frames are interpreted at another frame rate.Editorial07Metadata inspectorInspect browser-readable video duration, raster, aspect ratio, file size, type, and estimated average data rate without uploading the file.Files08SRT validatorValidate SRT cue structure and timing, shift every caption locally, preview the result, and download a corrected copy.Captions09Chapter formatterNormalize chapter timestamps into a clean YouTube-style list and validate their order and starting timestamp.Publishing10Image sequenceCalculate inclusive image-sequence frame counts, duration, handle ranges, and detect missing frames from a pasted frame list.VFX
Privacy cue
Your footage does not need a round trip.
Calculations execute in your browser. The metadata inspector and SRT helper use local browser file access; selected files are not sent to toolsforvideoeditors.com. Read the privacy policy.