Drop a video here or click to select
The browser previews supported video formats locally.
Drop an SRT or VTT file here or click to select
Import one subtitle file up to 5 MB and 2,000 cues.
Current time:
Select a cue, seek the video to its correct spoken moment, and capture two points far apart. Applying calibration corrects both offset and gradual timing drift.
Not captured
Not captured
Load a subtitle file or add a cue to begin editing.
Video and subtitle files stay in this browser tab and are not uploaded.
Edit SRT and VTT cue text and timing while previewing captions over a local video. Click a cue to seek, use the current video time for boundaries, or shift all cues together.
Timing validation reports invalid ranges, cues that are out of order, and overlaps. Overlaps are warnings because they can be intentional.
Related tools: Subtitle Validator · SRT Time Shifter
Code Formatter and Code Beautifier tools for Python, JSON and other languages.
Compare JSON, validate schemas, and convert JSON to CSV or YAML.
View CSV and Excel files, format tables, or convert CSV to Excel and SQL.
Write in Markdown Editor and convert Markdown to HTML or plain text.
Compare text, count words, sort lines, and find or replace text.
Convert audio, play sound or PCM files, and edit audio metadata.
Edit, join or split audio, remove noise, and adjust speed, pitch or volume.
Generate AI speech from text, transcribe recordings, or record your voice.
Convert and compress video, trim clips, or resize frames.
Play video, record your screen or camera, or use Online Mirror.
Merge PDF, split pages, compress files, and convert PDF to images.
Convert images, resize photos, compress files, and extract text with OCR.
Create GIFs, text images, screenshots, word clouds and favicons.
Edit subtitles, convert SRT to VTT, and adjust subtitle timestamps.
Extract archives, create ZIP files, and compress folders.
Encode or decode Base64, escape URLs, and work with HTML or Unicode escapes.
Convert number bases, turn numbers into words, and work with binary or hex.
Use percentage, fraction and statistics calculators for everyday calculations.
Check Online Clock, use Stopwatch, or calculate date differences.
Find your IP address, test IPv6, and calculate CIDR ranges.
Convert units of length, weight, temperature and data storage.
Convert colors, pick a palette from an image, and check color contrast.
Create or read QR codes and barcodes, including Wi-Fi QR codes.
Generate hashes, passwords and UUIDs, test regular expressions, and work with code utilities.
Check screen size, measure with a screen ruler, test your keyboard, or use a teleprompter.
Take a break with Smash Golden Eggs.